No singles at all - none (5,1,3)
I believe the answer is:
never a one
'none' is the definition.
(thesaurus)
'no singles at all' is the wordplay.
I cannot quite see how this works, but
'no' could be 'o' (resembles 0 - 'no' can mean 'zero') and 'o' is found within the answer.
'at all' could be 'ever' (I've seen this in another clue) and 'ever' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
I've seen this clue in the Evening Standard.
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