Doing stuff with HAIR can involve a variety of activities, such as dyeing, styling, and adding products. The crossword solutions for the term 'do stuff' include 'HAIR' (4 letters), 'DYE' (3 letters), 'GEL' (3 letters), 'MOUSSE' (6 letters), 'hairgel' (7 letters), and 'hairlacquer' (11 letters). These words refer to different activities that can be done to HAIR, such as dyeing it, using styling products like GEL or MOUSSE, and finishing it off with a hairgel or hairlacquer.