Head's boil somehow got rid of (9)
I believe the answer is:
abolished
'got rid of' is the definition.
('abolish' can be a synonym of 'get rid of')
'head's boil somehow' is the wordplay.
'somehow' is an anagram indicator.
'heads'+'boil'='headsboil'
'headsboil' with letters rearranged gives 'ABOLISHED'.
(Other definitions for abolished that I've seen before include "Done away with" , "Got rid of" .)