One playing with brass elephant, perhaps (9)
I believe the answer is:
trumpeter
I believe this clue is a double definition.
'one playing with brass' is the first definition.
(musician in the brass section)
'elephant perhaps' is the second definition.
(elephants trumpet with their trunks)
(Other definitions for trumpeter that I've seen before include "Brass player" , "Elephant perhaps" , "loud-voiced bird" , "sends out signals?" , "Perhaps Nellie" .)