Dance uses some three legs (4)
I believe the answer is:
reel
'dance' is the definition.
(reel is a kind of dance)
'some three legs' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'REEL' can be found hidden inside 'three legs'.
'uses' is the link.
(Other definitions for reel that I've seen before include "Revolving spool" , "Lively Scottish dance" , "Stagger in Irish dance" , "long stretch of film" , "Stagger around in the dance" .)