Politician taking money to fiddle a rota (7)
I believe the answer is:
senator
'politician' is the definition.
(senator is a kind of politician)
'taking money to fiddle a rota' is the wordplay.
'taking' indicates putting letters inside.
'money' becomes 'sen' (I've seen this before).
'to fiddle' indicates an anagram.
'rota' with letters rearranged gives 'ator'.
'sen' placed into 'ator' is 'SENATOR'.
(Other definitions for senator that I've seen before include "American politician" , "Member of government" , "US legislator" , "eg Bob Dole" , "One from uni's governing body" .)