Metal peeler (6)
I believe the answer is:
copper
I believe this is a double definition.
'metal' is the first definition.
(copper is a kind of metal)
'peeler' is the second definition.
(I've seen this before)
(Other definitions for copper that I've seen before include "A little cash" , "Old policeman or reddish metal" , "Little money" , "English policeman" , "Reddish metallic element" .)