Crossword Genius

Expert sorts nice ticket for play (6,9)

Ross

I believe the answer is:

rocket scientist

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'expert' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's a link between them I don't understand?

'sorts nice ticket for play' is the wordplay.
'for play' indicates anagramming the letters (I've seen this in other clues).
'sorts'+'nice'+'ticket'='sortsniceticket'
'sortsniceticket' anagrammed gives 'ROCKET SCIENTIST'.

Can you help me to learn more?

(Other definitions for rocket scientist that I've seen before include "Mastermind" , "boffin" , "A high achiever" , "brain" , "Clever chap" .)

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