Corruption in Strasbourg politician reversed for now (3,3)
I believe the answer is:
pro tem
'for now' is the definition.
(short for pro tempore, meaning for the time being)
'corruption in strasbourg politician reversed' is the wordplay.
'corruption' becomes 'rot' (I've seen this in other clues).
'in' is an insertion indicator.
'strasbourg politician' becomes 'MEP' (Member of European Parliament based in Strasbourg).
'reversed' says the letters should be written in reverse.
'mep' written backwards gives 'pem'.
'rot' put within 'pem' is 'PRO TEM'.
(Other definitions for pro tem that I've seen before include "For the present" , "Informally, for the time being" , "until proper arrangement is made" , "'For the time being (3,3)'" , "not indefinitely extended" .)