Dance crew walk unsteadily after a few (9,4)
I believe the answer is:
eightsome reel
'dance' is the definition.
(I've seen this before)
'crew walk unsteadily after a few' is the wordplay.
'crew' becomes 'eight' (I've seen this before).
'walk unsteadily' becomes 'reel'.
'after' means one lot of letters go next to another.
'a few' becomes 'some' (I've seen this before**).
'reel' put after 'some' is 'somereel'.
'eight'+'somereel'='EIGHTSOME REEL'
(Other definitions for eightsome reel that I've seen before include "See leg hit more (anag) - Scottish dance" , "Part of ceilidh perhaps" , "feature of ceilidh" , "Lively Scottish dance" .)