The term 'give some slack' is an idiom that means to be more lenient or forgiving. The crossword solutions for this term are RELENT (6 letters), EASE (4 letters), LOOSEN (6 letters), and LETUP (5 letters). All of these words mean to become less strict or to reduce the intensity of something. RELENT means to give in or to stop resisting, EASE means to make something less difficult or to relax, LOOSEN means to make something less tight or rigid, and LETUP means to become less intense or to decrease.