Look after current politician causing damage (6)
I believe the answer is:
impair
'damage' is the definition.
(impairing is a kind of damaging)
'look after current politician' is the wordplay.
'look' becomes 'air' (I've seen this before).
'after' says to put letters next to each other.
'current' becomes 'i' (symbol for electric current).
'politician' becomes 'mp'.
'i'+'mp'='imp'
'air' put after 'imp' is 'IMPAIR'.
'causing' acts as a link.
(Other definitions for impair that I've seen before include "blunt" , "Courteous man (colloq.)" , "Make worse or less effective" , "Reduce" , "Weaken, damage" .)