Always avoiding delirious angle (4)
I believe the answer is:
fish
'angle' is the definition.
(I know that angle can be written as fish)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for fish that I've seen before include "Aquatic vertebrate" , "Angle, troll" , "- - and chips" , "rock, perhaps" , "Weatherman" .)