Some scallywag grounded as a result of hostile troublemaking (5)
I believe the answer is:
aggro
'hostile troublemaking' is the definition.
(I've seen this before)
'some scallywag grounded' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'AGGRO' is hidden within 'scallywag grounded'.
'as a result of' is the link.
(Other definitions for aggro that I've seen before include "Slang for deliberate trouble-making" , "offensive behaviour" , "Difficulties (informal)" , "Boorish, threatening behaviour (slang)" , "Fighting" .)