Being foxy, liven up dancing (7)
I believe the answer is:
vulpine
'being foxy' is the definition.
(I've seen this before)
'liven up dancing' is the wordplay.
'dancing' indicates an anagram.
'liven'+'up'='livenup'
'livenup' is an anagram of 'VULPINE'.
(Other definitions for vulpine that I've seen before include "Being foxy" , "Characteristic of a fox" , "Cunning as a fox - liven up (anag)" , "like Basil Brush?" , "Like a fox -- liven up (anag)" .)