Fish, in a way (5)
I believe the answer is:
troll
'fish in a way' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for troll that I've seen before include "Malignant elf" , "Cyber pest" , "cave dweller" , "Ugly character from Norse legend" , "Scandinavian dwarf or giant" .)