Move like a crab (5)
I believe the answer is:
sidle
'move like a crab' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for sidle that I've seen before include "Slide (anag.)" , "Walk sideways like crab" , "Move in furtive or timid manner" , "sidewalk" , "Make cautious progress" .)