Inside, holding racket (3)
I believe the answer is:
din
'racket' is the definition.
(both can mean a loud noise or disturbance)
'inside holding' is the wordplay.
'inside' indicates the answer is hidden within the clue.
'DIN' is hidden within 'holding'.
(Other definitions for din that I've seen before include "'Continuous, unpleasant noise (3)'" , "Distracting noise" , "Roar of confused noises" , "Loud harsh hoise" , "commotion" .)