Spoiled current broadcast about politician (8)
I believe the answer is:
impaired
'spoiled' is the definition.
('impair' can be a synonym of 'spoil')
'current broadcast about politician' is the wordplay.
'current' becomes 'I' (symbol for electric current).
'broadcast' becomes 'aired' (synonyms).
'about' means one lot of letters go next to another.
'politician' becomes 'MP' (Member of Parliament).
'aired' after 'mp' is 'mpaired'.
'i'+'mpaired'='IMPAIRED'
(Other definitions for impaired that I've seen before include "Disabled" , "hurt" , "casued damage" , "Damaged, marred" , "Spoilt" .)