Minister meets a politician for overhaul (6)
I believe the answer is:
revamp
'overhaul' is the definition.
(I've seen this before)
'minister meets a politician' is the wordplay.
'minister' becomes 'rev' (short for reverend).
'meets' means one lot of letters go next to another.
'politician' becomes 'MP' (Member of Parliament).
'rev'+'a'+'mp'='REVAMP'
'for' is the link.
(Other definitions for revamp that I've seen before include "new arrangement" , "face-lift" , "Refurbish" , "Give new appearance to" , "Give makeover to" .)