Sarge gives out, instigating attack (10)

I believe the answer is:

aggressive

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'instigating attack' is the definition.
I can't tell whether this defines the answer.

'sarge gives out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'sarge'+'gives'='sargegives'
'sargegives' is an anagram of 'AGGRESSIVE'.

Can you help me to learn more?

(Other definitions for aggressive that I've seen before include "Vigorous" , "Combative - pushing" , "Pushy" , "Showing anger" , "Forceful" .)

I've seen this clue in The Independent.

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