Pirate's funny walk (7)
I believe the answer is:
traipse
'walk' is the definition.
(traipsing is a kind of walking)
'pirate's funny' is the wordplay.
'funny' is an anagram indicator.
'pirates' anagrammed gives 'TRAIPSE'.
(Other definitions for traipse that I've seen before include "travel wearily" , "long tiring walk" , "Walk heavily" , "make slow progress" , "Trudge or tramp in parties" .)