Racket involved in bidding (3)
I believe the answer is:
din
'racket' is the definition.
(thesaurus)
'involved in bidding' is the wordplay.
'involved in' says the answer is hidden in the clue.
'DIN' is hidden within 'bidding'.
(Other definitions for din that I've seen before include "Clamour" , "Unwanted noise" , "Rumpus" , "Loud and long noise" , "Loud unpleasant noise" .)