Little fish of various parts (5)
I believe the answer is:
sprat
'little fish' is the definition.
(I've seen this before)
'various parts' is the wordplay.
'various' indicates an anagram.
'parts' with letters rearranged gives 'SPRAT'.
'of' is the link.
(Other definitions for sprat that I've seen before include "Couple sharing meat" , "Tiny fish" , "chap giving richer course material to the Dutch" , "It's set to catch a mackerel" , "'Set a . . . . . to catch a whale'" .)