Fish with temperature taken in by medic (8)
I believe the answer is:
sturgeon
'fish' is the definition.
(type of fish)
'temperature taken in by medic' is the wordplay.
'temperature' becomes 't' (abbreviation).
'taken in by' is an insertion indicator.
'medic' becomes 'surgeon' (I've seen this before).
't' placed into 'surgeon' is 'STURGEON'.
'with' is the link.
(Other definitions for sturgeon that I've seen before include "Something fishy here" , "Fish from which caviar is obtained" , "Caviare-yielding fish" , "Fish that yields caviare" , "Our gents, oddly, caught the fish" .)