Gets rid of Democrat, politician in America (5)
I believe the answer is:
dumps
'gets rid of' is the definition.
(dumping is a kind of getting rid of)
'democrat politician in america' is the wordplay.
'democrat' becomes 'd'.
'politician' becomes 'mp'.
'in' means one lot of letters goes inside another.
'america' becomes 'us' (abbreviation for the United States).
'mp' put inside 'us' is 'umps'.
'd'+'umps'='DUMPS'
(Other definitions for dumps that I've seen before include "melancholic state" , "gloominess" , "Tips, discards" , "Disposes of - depression" , "Abandons (rubbish)" .)