A star turn in a star turn (7)

I believe the answer is:

sinatra

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'a star turn' is the definition.
The definition suggests a singular noun which matches the answer.

'in a star turn' is the wordplay.
'turn' is an anagram indicator.
'in'+'a'+'star'='inastar'
'inastar' with letters rearranged gives 'SINATRA'.

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(Other definitions for sinatra that I've seen before include "Francis Albert, mourned singer" , "Frank . . . . . . ., late great popular singer" , "'Old Blue Eyes'" , "'Ol' Blue Eyes'" , "Something of a strain for top crooner" .)

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