Crown's goal evens out a dance line (5)
I believe the answer is:
conga
'a dance line' is the definition.
(I've seen this in another clue)
'crown's goal evens out' is the wordplay.
'evens out' means one should take alternating letters (remove letters in even-numbered positions).
'crowns'+'goal'='crownsgoal'
The alternating letters of 'crownsgoal' are 'CONGA'.
(Other definitions for conga that I've seen before include "Chain dance" , "Long-line dance" , "What gets line moving rhythmically" , "Circuitous line dance" , "Cuban dance of three steps followed by a kick" .)