Drunk captures hearts in photograph (4)
I believe the answer is:
shot
'photograph' is the definition.
(I know that shot is a type of photograph)
'drunk captures hearts' is the wordplay.
'drunk' becomes 'sot' (both can mean someone who drinks too much).
'captures' means one lot of letters goes inside another.
'hearts' becomes 'h' (abbreviation used in card games e.g. bridge).
'sot' enclosing 'h' is 'SHOT'.
'in' acts as a link.
(Other definitions for shot that I've seen before include "Sent a bullet" , "Fired or filmed" , "Attempt (to kill?)" , "Attempt - hit with bullet" , "Ruined; photograph" .)