Thoroughly searched, managed to get dismissed (9)
I believe the answer is:
ransacked
'thoroughly searched' is the definition.
(to ransack is to search through and cause damage)
'managed to get dismissed' is the wordplay.
'managed to get' becomes 'ran' (I've seen this in other clues).
'dismissed' becomes 'sacked' ('sack' can be a synonym of 'dismiss').
'ran'+'sacked'='RANSACKED'
(Other definitions for ransacked that I've seen before include "turned upside down?" , "Plundered" , "Pillaged" , "Rifled" , "rifle in the past" .)