A gig for some banjo boys? (3)
I believe the answer is:
job
'a gig' is the definition.
(I've seen this in another clue)
'some banjo boys' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'JOB' is hidden in the letters of 'banjo boys'.
'for' acts as a link.
(Other definitions for job that I've seen before include "Task; paid position" , "Line" , "'Task, chore (3)'" , "task for Hebrew leader noted for misfortunes" , "Employment" .)