Eastern politician bound to be exhausted (7)
I believe the answer is:
emptied
'be exhausted' is the definition.
(I've seen this before)
'eastern politician bound' is the wordplay.
'eastern' becomes 'e'.
'politician' becomes 'MP' (Member of Parliament).
'bound' becomes 'tied' (similar in meaning).
'e'+'mp'+'tied'='EMPTIED'
'to' is the link.
(Other definitions for emptied that I've seen before include "Removed the contents" , "was draining" , "Evacuated" , "Made void" , "gutted" .)