Job with an odd instrument (5)
I believe the answer is:
banjo
'instrument' is the definition.
(I know that banjo is a type of stringed instrument)
'job with an odd' is the wordplay.
'with' means one lot of letters go next to another.
'odd' indicates anagramming the letters.
'job' after 'an' is 'anjob'.
'anjob' with letters rearranged gives 'BANJO'.
(Other definitions for banjo that I've seen before include "Softly (music)" , "Guitar-like instrument" , "Something instrumental" , "Bluegrass instrument?" , "Small plucked instrument" .)