Acted as an informant, in Ipswich (6)
I believe the answer is:
narked
(Other definitions for narked that I've seen before include "Angry" , "Annoyed - upset - irritated" , "Nettled" , "Cross" , "'Vexed, riled (6)'" .)
I believe the answer is:
narked
(Other definitions for narked that I've seen before include "Angry" , "Annoyed - upset - irritated" , "Nettled" , "Cross" , "'Vexed, riled (6)'" .)