Walk like a crab (5)
I believe the answer is:
sidle
'walk like a crab' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sidle that I've seen before include "steal" , "Move along sideways" , "Isled (anag.)" , "Walk obliquely" , "Move in furtive or timid manner" .)