Part of job of fine scientist (6)
I believe the answer is:
boffin
'scientist' is the definition.
(boffin can informally mean a scientist)
'part of job of fine' is the wordplay.
'part of' says the answer is hidden in the clue.
'BOFFIN' is hidden in the letters of 'job of fine'.
(Other definitions for boffin that I've seen before include "Scientist (in the back room?)" , "Brainbox" , "(Government) scientist" , "Back-room boy" , "Research scientist" .)