Sacked from bar finally, I scarpered (6)
I believe the answer is:
rifled
'sacked' is the definition.
'bar finally i scarpered' is the wordplay.
'finally' indicates one should take the final letters.
'scarpered' becomes 'fled'.
The final letter of 'bar' is 'r'.
'r'+'i'+'fled'='RIFLED'
'from' acts as a link.
(Other definitions for rifled that I've seen before include "Ransacked" , "Searched through" .)