Vivacity in dancing priest (6)
I believe the answer is:
esprit
'vivacity' is the definition.
(I've seen this before)
'dancing priest' is the wordplay.
'dancing' indicates an anagram.
'priest' with letters rearranged gives 'ESPRIT'.
'in' acts as a link.
(Other definitions for esprit that I've seen before include "Sparkling quality" , "Liveliness - priest (anag)" , "Group morale is . . . . . . de corps" , "Vivacity - wit" , "Stripe (anag)" .)