Spoils excessively large reels (4)
I believe the answer is:
loot
'spoils excessively' is the definition.
'loot' can be an answer for 'spoils' (both can mean a reward or proceeds). I am not certain of the 'excessively' bit.
'large reels' is the wordplay.
'large' becomes 'L' (eg in clothes sizes).
'reels' becomes 'oot' (I am not sure about this - if you are sure you should believe this answer much more).
'l'+'oot'='LOOT'
Can you help me to learn more?
(Other definitions for loot that I've seen before include "Haul" , "Stolen goods" , "Orton play; ill-gotten gains" , "Burglar's takings - pillage" , "Steal property (in war)" .)