Crossword Genius

The occasional one without a mate (3)

Ross

I believe the answer is:

odd

I believe this clue is a triple definition!

'the occasional' is the first definition.
(odd can mean occasional or infrequent)

'one' is the second definition.
(I've seen this before)

'without a mate' is the third definition.
(I've seen this in another clue)

(Other definitions for odd that I've seen before include "Extraordinary" , "Not matching" , "Freakish" , "Eccentric or unpaired" , "Weird" .)

I've seen this clue in the Evening Standard.
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