Hack maybe with Times tucking into top-notch biscuits (8)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

An envelope (‘tucking into’) of MARE (‘hack maybe’ – not all horses are hacks, and not all are mares) plus (‘with’) TT (‘times’) in AI (given the recent attempt, reported here, to use AI to solve a crossword clue, probably not Artificial Intelligence, but A1, ‘top notch’)