Drawer opened by bears — jam! (10)
I believe the answer is:
standstill
'jam' is the definition.
(I've seen this before)
'drawer opened by bears' is the wordplay.
'drawer' becomes 'till' (I've seen this before).
'opened by' means one lot of letters go next to another (some letters open or go before others).
'bears' becomes 'stands' ('stand' can be a synonym of 'bear').
'till' after 'stands' is 'STANDSTILL'.
(Other definitions for standstill that I've seen before include "Perhaps jam" , "complete halt" , "negation of motion" , "stoppage" , "Situation without movement or activity" .)