Corrupt place needing purge (6)
I believe the answer is:
putrid
'corrupt' is the definition.
('putrid' can be a synonym of 'corrupt')
'place needing purge' is the wordplay.
'place' becomes 'put' ('put' can be a synonym of 'place'**).
'needing' means one lot of letters go next to another.
'purge' becomes 'rid' (I've seen this in other clues).
'put'+'rid'='PUTRID'
(Other definitions for putrid that I've seen before include "Foul" , "corrupt" , "Decaying, rotting" , "High" , "Rancid" .)