Every individual taking part in fine achievements (4)
I believe the answer is:
each
'every individual' is the definition.
(I've seen this before)
'part in fine achievements' is the wordplay.
'part in' indicates the answer is hidden within the clue.
'EACH' is hidden in the letters of 'fine achievements'.
'taking' acts as a link.
(Other definitions for each that I've seen before include "Per person" , "Ache (anag.)" , "This way for a place" , "every individual" , "Per capita, apiece" .)