Outfit worn by suspect into disturbing the peace (7)
I believe the answer is:
rioting
'disturbing the peace' is the definition.
(a riot is a public disturbance)
'outfit worn by suspect into' is the wordplay.
'outfit' becomes 'rig' (synonyms).
'worn by' is an insertion indicator (I've seen this in other clues).
'suspect' is an anagram indicator (a suspicious or unusual spelling).
'into' with letters rearranged gives 'otin'.
'rig' placed around 'otin' is 'RIOTING'.
(Other definitions for rioting that I've seen before include "causing uproar" , "Fighting" , "Causing a violent disturbance" , "civil disorder" , "Disturbance of the peace" .)