Hoodlum grabs cricket trophy and behaves aggressively (6,3)
I believe the answer is:
lashes out
'behaves aggressively' is the definition.
(to lash out is to become violent)
'hoodlum grabs cricket trophy' is the wordplay.
'hoodlum' becomes 'lout' (both can mean a violent youth).
'grabs' means one lot of letters goes inside another.
'cricket trophy' becomes 'ashes' (I've seen this before).
'lout' placed around 'ashes' is 'LASHES OUT'.
'and' acts as a link.
(Other definitions for lashes out that I've seen before include "removing part of eye?" , "Hits wildly" .)