Look deranged without editor, flailing (6)
I believe the answer is:
gander
'look' is the definition.
(informal term for a look or glance)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for gander that I've seen before include "Looking at something - ranged (anag)" , "Goose sauce is good for it" , "He has webbed feet" , "male member of the Anatidae family" , "Glimpse" .)