Trouble about gangs getting rudely obnoxious initially (5)

I believe the answer is:

aggro

'trouble' is the definition.
(I've seen this before)

'about gangs getting rudely obnoxious initially' is the wordplay.
'initially' says to take the initial letters.
The initial letters of 'about gangs getting rudely obnoxious' is 'AGGRO'.

(Other definitions for aggro that I've seen before include "Attacking behaviour" , "Potential violence" , "Yobbish violence" , "Violence - obstructiveness" , "Hostile behaviour" .)

I've seen this clue in The Telegraph.

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