Spoils look of tin-openers (4)
I believe the answer is:
loot
'spoils' is the definition.
(I've seen this before)
'look of tin-openers' is the wordplay.
'look' becomes 'lo' (archaic term meaning 'look!').
'openers' says to take the initial letters.
The initial letters of 'of tin' is 'ot'.
'lo'+'ot'='LOOT'
(Other definitions for loot that I've seen before include "Orton play; ill-gotten gains" , "Tool for plundering" , "Stolen property" , "Stolen goods" , "Prize" .)