Cocky walk (7)
I believe the answer is:
swagger
'cocky walk' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for swagger that I've seen before include "Proud, pompous gait" , "Walk self-importantly, strut" , "Move confidently" , "Walk with an air of self-importance" , "Boast" .)