One possibility is that Sakura tries to communicate with Itachi. She might try to reason with him, asking him why he has her captive. This could lead to some revelations about Itachi's true intentions. If Itachi is part of some bigger plot, Sakura could find out crucial information during this conversation, which could either make her situation worse or give her a chance to escape.
Well, in such a fanfiction, Sakura might struggle because Itachi is an extremely powerful and complex character. His motives are often mysterious. Maybe Sakura is trying to break free from his grip physically or mentally. For example, she could be held captive in a situation where she has to use her own skills and knowledge to outwit Itachi. It could also be a situation where she is caught in the middle of Itachi's plans that she doesn't understand at first.
In this kind of fanfiction, Sakura might be in a very dangerous situation. She could be facing Itachi's powerful jutsu while struggling in his grip. Itachi is a very strong character, so Sakura may have to use all her skills and knowledge just to survive. Maybe she'll try to break free and find a way to counter Itachi's moves.
It could be about Sakura being in a difficult situation while in Itachi's grip, perhaps in a battle scenario where Itachi has the upper hand physically. Maybe she's trying to break free to either save herself or someone else.
She could use her brute strength enhanced by chakra to try and break free. If she can concentrate enough chakra to her limbs, she might be able to overpower Itachi's hold for a moment and create an opening to escape.
Well, it could be about Sakura being in a difficult situation where Itachi has some sort of control over her. Maybe Itachi is using his power or influence to force Sakura to do something against her will, and she is constantly trying to break free from his grip, both literally and metaphorically.
There could be a deus ex machina situation where a third character, like the Beast, shows up to rescue her. This would add an element of drama and action to the fanfiction. It would also create a complex dynamic between the three characters.
In this fanfiction, perhaps Sakura is struggling because the clone of Itachi has some sort of special power or ability that she is unable to break free from. It could be related to genjutsu, and she's constantly fighting against the illusions while in the grip of the clone. Another possibility is that she's in a moral dilemma while in this situation, for example, if she has to make a choice between saving herself or sacrificing for the greater good.
One possible reason could be that Itachi is an enemy or antagonist in this fanfiction. His tight grip might be a sign of his aggression towards Sakura. Maybe he wants to use her as a hostage or for some other malicious purpose.
The concept of Sakura struggling in Itachi's tight grip in fanfiction is quite interesting. It could be a physical struggle, like she's trying to escape his hold. Or it could be more of an emotional or mental struggle. For example, if Itachi is using some form of mind - control or manipulation. This situation can also lead to different plot twists. Perhaps Sakura discovers a new power or ability while in this struggle, or she forms an unexpected alliance to free herself.
It might signify a shift in their relationship dynamic. Maybe the writer is exploring a new, unexpected connection between them.