Partly flat, Hindu's wooden weapon (5)
I believe the answer is:
lathi
'weapon' is the definition.
(I've seen this before)
'partly flat hindu's wooden' is the wordplay.
'partly' says the answer is hidden in the clue (part of the clue is used).
'LATHI' is hidden within 'flat hindus wooden'.
(Other definitions for lathi that I've seen before include "may give wallop to dacoit" , "Indian truncheon" , "club in India" , "club used by an Indian policeman" , "instrument of punishment" .)