Staggers in fast dances (5)
I believe the answer is:
reels
I believe this clue is a double definition.
'staggers' is the first definition.
('reel' can be a synonym of 'stagger')
'fast dances' is the second definition.
(I've seen this in another clue)
'in' acts as a link.
(Other definitions for reels that I've seen before include "Staggers about in Irish dances" , "Highland dances" , "Goes round and round" , "Staggers about in lively dances" , "performed by dancers" .)