Crossword Genius

Belligerent windbag gropes interns (5)

Ross

I believe the answer is:

aggro

I'm a little stuck... Click here to teach me more about this clue!

'belligerent' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.

'windbag gropes interns' is the wordplay.
'AGGRO' is hidden within the letters.
However, I'm not sure how this is indicated.

Can you help me to learn more?

(Other definitions for aggro that I've seen before include "Difficulties, trouble" , "Hostile troublemaking" , "Violence - difficulties" , "Attacking behaviour" , "Aggressive, violent behaviour in short" .)

I've seen this clue in the Sydney Morning Herald.
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