Skin trouble a politician gets in plenty (7)
I believe the answer is:
pimples
'skin trouble a' is the definition.
I can't judge whether this definition defines the answer.
'politician gets in plenty' is the wordplay.
'politician' becomes 'mp' (Member of Parliament).
'gets in' indicates putting letters inside.
'plenty' becomes 'piles' (I am not sure about this - if you are sure you should believe this answer much more).
'mp' going into 'piles' is 'PIMPLES'.
Can you help me to learn more?
(Other definitions for pimples that I've seen before include "Rash" , "(Skin) spots" , "Small unsightly pustules on face" .)