What does the cryptic crossword clue "Fish a curious topping for ginger nut? (3,6)" mean?

The definition is "Fish / a curious topping for ginger nut?". The wordplay uses a double definition. Double definition The answer is RED MULLET.

Fish a curious topping for ginger nut? (3,6)

Times Cryptic #29069 | 5 Down | 2024-11-08 flower