A drummer Nina shifted is still available! (9,3)

I believe the answer is:

unmarried man

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'still available' is the definition.
I can't judge whether this defines the answer.

'a drummer nina shifted' is the wordplay.
'shifted' indicates an anagram.
'a'+'drummer'+'nina'='adrummernina'
'adrummernina' anagrammed gives 'UNMARRIED MAN'.

'is' is the link.

Can you help me to learn more?

I've seen this clue in The Irish Times.

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