You may have craned to watch one perform (6)
I believe the answer is:
dancer
'you may' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'craned to watch one perform' is the wordplay.
'craned' can be anagrammed to 'DANCER'.
Though, I'm not sure how this is indicated.
'have' is the link.
Can you help me to learn more?
(Other definitions for dancer that I've seen before include "Craned (anag.)" , "behind Rudolph" , "Terpsichorean" , "One in the same team as, say, Rudolf" , "Nureyev?" .)