Bobby's coin (6)
I believe the answer is:
copper
I believe this is a double definition.
'bobby's' is the first definition.
(I've seen this before)
'coin' is the second definition.
(copper is a kind of coin)
(Other definitions for copper that I've seen before include "Little money" , "Reddish-brown like colourful beech" , "An element; small coin" , "Metal - washing-machine?" , "peeler" .)