Lively Irish dance (4)
I believe the answer is:
reel
'lively irish dance' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for reel that I've seen before include "A merry dance or an angler's winder" , "Turn around in the dance" , "Fishing rod attachment" , "Cylinder on which something is wound" , "Lively dance or fishing rod controller" .)