No one to be charged for participating in public brawl (4-3-3)

I believe the answer is:

free-for-all

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'public brawl' is the definition.
(I've seen this before)

I don't understand the remainder of the clue.

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

I've seen this clue in The Irish Times.

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