A good comeback is a witty or clever response to an insult or criticism. The two crossword solutions for the term 'good comeback' are 'TOUCHE' (6 letters) and 'NICEONE' (7 letters). 'Touche' is a French expression meaning 'I have been touched' and is used to acknowledge a clever point made by someone else. 'Niceone' is a slang term used to express approval or admiration for someone's clever remark.