Cabinet committee backing Conservative leader in revolt (8)
I believe the answer is:
cupboard
'cabinet' is the definition.
(I've seen this before)
'committee backing conservative leader in revolt' is the wordplay.
'committee' becomes 'board' (board is a kind of committee).
'backing' is a charade indicator (letters next to each other).
'conservative leader' becomes 'c' (I've seen this in other clues).
'in revolt' becomes 'up' (I've seen this in other clues).
'c'+'up'='cup'
'board' after 'cup' is 'CUPBOARD'.
(Other definitions for cupboard that I've seen before include "Storage cabinet" , "Furniture for storing provisions etc." , "Store for crockery etc" , "Locker" , "Piece of furniture in which things are stored" .)