Bobby and Penny? (6)
I believe the answer is:
copper
This clue is a double definition.
'bobby' is the first definition.
(thesaurus)
'penny?' is the second definition.
(copper is a kind of penny)
'and' is the link.
(Other definitions for copper that I've seen before include "Low-value coin" , "peeler" , "Part of force" , "Red-brown metal" , "English policeman" .)