Peacekeepers fight to get out? (5)

I believe the answer is:

unbox

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'get out?' is the definition.
The answer and definition can be both to do with contact as well as being verbs in their base form.
Maybe they are linked in a way I don't understand?

'peacekeepers fight' is the wordplay.
'peacekeepers' becomes 'UN' (United Nations, peacekeeping organisation).
'fight' becomes 'box' (boxing is a kind of fighting).
'un'+'box'='UNBOX'

'to' is the link.

Can you help me to learn more?

(Another definition for unbox that I've seen is " Take out of a carton".)

I've seen this clue in The Times.

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