One who applauds committee's filming equipment (12)
I believe the answer is:
clapperboard
'filming equipment' is the definition.
'clapperboard' can be an answer for 'equipment' (clapperboard is a kind of equipment). I am not certain of the 'filming' bit.
'one who applauds committee's' is the wordplay.
'one who applauds' becomes 'clapper' (I've seen this before).
'committee' becomes 'board' (board is a kind of committee).
'clapper'+'board'='CLAPPERBOARD'
Can you help me to learn more?
(Other definitions for clapperboard that I've seen before include "part in film-making" , "Film maker's aid" , "Agent of filmmaker" , "one way to call the shots?" , "It's used at start of filming" .)