Misuse of draft powers? Volunteer to help (4,7)

I believe the answer is:

step forward

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'volunteer to help' is the definition.
I can't judge whether this defines the answer.

'misuse of draft powers?' is the wordplay.
'misuse of' indicates anagramming the letters (I've seen this in other clues).
'draft'+'powers'='draftpowers'
'draftpowers' anagrammed gives 'STEP FORWARD'.

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I've seen this clue in The Guardian.

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