Crossword Genius

One or two people playing (6)

Ross

I believe the answer is:

single

I'm a little stuck... Click here to teach me more about this clue!

'one' is the definition.
(similar in meaning)

'two people playing' is the wordplay.
I cannot really understand how this works, but
'playing' could be 'in' and 'in' is found within the answer.
This explanation may well be incorrect...

'or' acts as a link.

Can you help me to learn more?

(Other definitions for single that I've seen before include "Ticket To Ride < : > hit" , "Just one - on one's own" , "Like bachelor" , "Sole" , "Unaccompanied" .)

I've seen this clue in the Evening Standard.
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