Crossword Genius

Managed to discharge rifle (7)

Ross

I believe the answer is:

ransack

'rifle' is the definition.
('ransack' can be a synonym of 'rifle')

'managed to discharge' is the wordplay.
'managed' becomes 'ran' (I've seen this before).
'to discharge' becomes 'sack' ('sack' can be a synonym of 'discharge').
'ran'+'sack'='RANSACK'

(Other definitions for ransack that I've seen before include "Search (a place) thoroughly" , "Plunder or turn upside down in search" , "Loot or search thoroughly" , "Search thoroughly and roughly" , "Plunder; search ruthlessly" .)

I've seen this clue in The Telegraph.
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