Nick and Bobby (3)
I believe the answer is:
cop
I believe this clue is a double definition.
'nick' is the first definition.
(both can mean to apprehend or arrest)
'bobby' is the second definition.
(I've seen this in other clues)
'and' acts as a link.
(Other definitions for cop that I've seen before include "Police officer (slang)" , "Get" , "Policeman (colloq.)" , "Police officer (informal)" , "busy" .)