Crossword Genius

Relax -- peacekeepers working following strike (8)

Ross

I believe the answer is:

unbutton

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'relax' is the definition.
Although both the answer and definition are verbs in their base form, I can't see how one could define the other.

'peacekeepers working following strike' is the wordplay.
'peacekeepers' becomes 'un'.
'working' becomes 'on'.
'following' is a charade indicator (letters next to each other).
'strike' becomes 'butt' (butting is a kind of striking).
'on' put after 'butt' is 'button'.
'un'+'button'='UNBUTTON'

Can you help me to learn more?

(Other definitions for unbutton that I've seen before include "Undo clothing" , "Become less inhibited" , "Undo fastening" .)

I've seen this clue in The Telegraph.
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