Blow up corrupt general (7)
I believe the answer is:
enlarge
'blow up' is the definition.
('enlarge' can be a synonym of 'blow up')
'corrupt general' is the wordplay.
'corrupt' indicates an anagram.
'general' anagrammed gives 'ENLARGE'.
(Other definitions for enlarge that I've seen before include "Gleaner (anag.)" , "Lengthen" , "scale up" , "Increase in size" , "Wax" .)