What does the cryptic crossword clue "From which rabbits may emerge — often with tails behind? (3,3)" mean?

The definition is "From which rabbits may emerge". The wordplay uses a double definition. Double definition The answer is TOPHAT.

From which rabbits may emerge — often with tails behind? (3,3)

Guardian Cryptic #29065 | 4 Down | 2023-05-09 flower