Fish tar initially caught in cutter? (8)
I believe the answer is:
sturgeon
'fish' is the definition.
(sturgeon is a kind of fish)
'tar initially caught in cutter?' is the wordplay.
'initially' suggests taking the first letters.
'caught in' means one lot of letters goes inside another.
'cutter?' becomes 'surgeon' (I can't justify this - if you can you should believe this answer much more).
The initial letter of 'tar' is 't'.
't' inserted inside 'surgeon' is 'STURGEON'.
Can you help me to learn more?
(Other definitions for sturgeon that I've seen before include "So urgent to find caviare-bearing fish" , "Shark-like fish" , "supplier of delicacy" , "Source of caviare and isinglass" , "Something fishy here" .)