Go back and watch the fifth dancer (7)
I believe the answer is:
nureyev
'dancer' is the definition.
(Rudolf Nureyev)
'go back and watch the fifth' is the wordplay.
I cannot quite understand how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is located in the answer.
'watch' could be 'eye' (eye can mean to watch or look at) and 'eye' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for nureyev that I've seen before include "Who might have danced" , "Austrian ballet dancer, 1938-93" , "Russian-born ballet dancer, who partnered Fonteyn, d. 1993" , "Famous Russian ballet dancer" , "Rudolf -------, (1938-93), dancer" .)