Annoyed about the welfare centre being ransacked (6)
I believe the answer is:
rifled
'being ransacked' is the definition.
(I've seen this before)
'annoyed about the welfare centre' is the wordplay.
'annoyed' becomes 'riled' ('rile' can be a synonym of 'annoy').
'about' means one lot of letters goes inside another.
'centre' indicates the central letters.
The central letter of 'welfare' is 'f'.
'riled' going around 'f' is 'RIFLED'.
(Other definitions for rifled that I've seen before include "Ransacked" , "Searched through" .)