Fish in crocodile, perhaps? (7)
I believe the answer is:
snapper
'fish' is the definition.
(snapper is a kind of fish)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for snapper that I've seen before include "sharp-toothed fish" , "Person photographing" , "Fish; marine turtle" , "Fish; photographer" , "(Often red) food fish" .)