The term 'ASSIST ILLEGALLY' can be summarized by two crossword solutions: ABET (4 letters) and LIFTAFINGER (11 letters). ABET means to actively encourage or support someone in an illegal activity. LIFTAFINGER is a phrase that means to give someone a subtle hint or suggestion to do something wrong or illegal. Both terms are used to describe the act of helping someone to commit a crime, either directly or indirectly.