I need help help with the parsing for quite a few today....
9a Caught, having left company, making illegal copy (5) - CLONE (Copy)
20a High time, perhaps to advance the last taboo (2,2) NO NO (Taboo)
19d In short, performing upset my namesake (7) - HOMONYM (Namesake)
22d After polling, put ballot box facing the other way (1-4) - U TURN