Shake a leg, quaintly (3)
I believe the answer is:
hie
'shake a leg quaintly' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hie that I've seen before include "Make one's way quickly" , "Go quickly (archaic)" , "Be quick (lit.)" , "Hasten" , "Hurry" .)