Stopped fighting crackers pack, cutting ends in foil (4,5)

I believe the answer is:

made peace

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'stopped fighting' is the definition.
The definition and answer can be both related to competing as well as being past participle verbs.
Perhaps they are linked in a way I don't understand?

'crackers pack cutting ends in foil' is the wordplay.
I cannot really understand how this works, but
'crackers' could be 'mad' (I've seen this before) and 'mad' is found within the answer.
This may be the basis of clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Telegraph.

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