Politician who raises the roof (8)
I believe the answer is:
thatcher
I believe this is a double definition.
'politician' is the first definition.
(Margaret Thatcher)
'who raises the roof' is the second definition.
(as in a thatched roof)
(Other definitions for thatcher that I've seen before include "The iron lady who fixed roofs" , "Stateswoman" , "1 16 as 6, she said" , "Member of 7 [ORDER OF MERIT]" , "Margaret, ex-prime minister, or a traditional roofer" .)