Maybe one's time to break for this (5)

I believe the answer is:

lunch

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'time to break for this' is the definition.
The definition suggests a singular noun which matches the answer.

'maybe one's' is the wordplay.
I cannot really see how this works, but
'one' could be 'un' (northern English dialect form of 'one') and 'un' is found in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Another definition for lunch that I've seen is " Midday meal".)

I've seen this clue in The Guardian.

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