Cleaner pulp fiction might be pulp fiction that has undergone some sort of editorial process to make it cleaner. For example, if we think about the typical elements of pulp fiction such as fast - paced action, often in a rather seedy or gritty setting. 'Cleaner' could mean that the seedy aspects have been toned down. So, instead of having a lot of criminal underworld details full of immoral behavior, it focuses more on the adventure or the mystery in a more family - friendly way. It could also mean that the writing style has been made more accessible and less convoluted, so that it's easier to read and understand for a broader range of readers.
Pulp fiction originally was known for its cheap, mass - produced nature with often lurid and sensational content. 'Cleaner pulp fiction' could imply that someone has taken this genre and cleaned it up in different ways. It might involve removing offensive language or making the characters' behavior more in line with moral standards. For instance, if a pulp fiction story used to have a lot of sexual innuendos or gratuitous violence, in 'cleaner pulp fiction' these elements are either removed or greatly reduced. It could also be that the themes are more positive. Instead of focusing on the downfall of a character due to vice, it could show a character's redemption or growth in a more positive light.