The term 'TOOK PART' can be broken down into four crossword solutions: ACTED (5 letters), SIDED (5 letters), PLAYED (6 letters), and JOINEDIN (8 letters). These words all refer to different ways of participating in an activity. Acting is a form of performance art, usually involving memorizing lines and taking on a character. Siding refers to taking a particular stance or position on an issue. Playing is engaging in a game or sport. Joining in is participating in an activity with others.