Tasers dispersed protest (6)
I believe the answer is:
assert
'protest' is the definition.
(I've seen this before)
'tasers dispersed' is the wordplay.
'dispersed' is an anagram indicator.
'tasers' anagrammed gives 'ASSERT'.
(Other definitions for assert that I've seen before include "State authoritatively" , "State firmly or vigorously" , "Express forcibly" , "Forcefully state" , "State firmly, declare as true" .)