Trumpeter might need this spokesperson (10)

I believe the answer is:

mouthpiece

I believe this is a double definition.

'trumpeter might need this' is the first definition.
(mouthpiece is a part of a trumpet)

'spokesperson' is the second definition.
(synonyms)

(Other definitions for mouthpiece that I've seen before include "Spokesman" , "Spokesperson" .)

I've seen this clue in The Guardian.

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