Weapon that injures a troublemaker contains uprising (5)
I believe the answer is:
taser
'weapon' is the definition.
(I know that Taser is a type of stun gun)
'injures a troublemaker contains uprising' is the wordplay.
'contains' says the answer is hidden in the clue.
'uprising' is a reversal indicator.
'resat' is hidden in the letters of 'injures a troublemaker'.
'resat' back-to-front is 'TASER'.
'that' is the link.
(Other definitions for taser that I've seen before include "Gun firing electrified barbs" , "Paralysing device used by police" , "Weapon firing electrified darts; stare (anag.)" , "Electric police weapon" , "Shocking device used by the police?" .)