What does the cryptic crossword clue "To which patron contributes a bit? (5)" mean?

The definition is "To which". The wordplay uses a hidden word. Hidden in [pa]TRON C[ontributes}, an &lit, and a very good one. The answer is TRONC.

To which patron contributes a bit? (5)

Times Cryptic #28627 | 22 Down | 2023-06-12 flower