Crossword Genius

A fight no-one will pay to see? (4-3-3)

Ross

I believe the answer is:

free-for-all

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

'a fight' is the definition.
(a free for all is a fight or brawl)

'no-one will pay to see?' is the wordplay.
I cannot really see how this works, but
'no' could be 'o' (resembles 0 - 'no' can mean 'zero') and 'o' is present in the answer.
'one' could be 'a' (a thing is one thing) and 'a' is found within the answer.
'will' could be 'll' (contracted form, as in 'he'll' - 'he will') and 'll' is located in the answer.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for free-for-all that I've seen before include "Disorganised event" , "Public brawl" .)

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