Opposed to staff getting some weapons (13)

I believe the answer is:

antipersonnel

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'getting some weapons' is the definition.
I can't tell whether this defines the answer.

'opposed to staff' is the wordplay.
'opposed to' becomes 'anti' (anti means opposing something).
'staff' becomes 'personnel' (I've seen this before).
'anti'+'personnel'='ANTIPERSONNEL'

Can you help me to learn more?

(Another definition for antipersonnel that I've seen is " Land-mine type".)

I've seen this clue in The Daily Express.

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