Satirise a politician taken in by simple-minded person (7)
I believe the answer is:
lampoon
'satirise' is the definition.
('lampoon' can be a synonym of 'satirize')
'a politician taken in by simple-minded person' is the wordplay.
'politician' becomes 'mp'.
'taken in by' means one lot of letters goes inside another.
'simple-minded person' becomes 'loon' (I've seen this before).
'a'+'mp'='amp'
'amp' going within 'loon' is 'LAMPOON'.
(Other definitions for lampoon that I've seen before include "Literary satire" , "joke" , "Ridicule in writing or verse" , "Personal satire" , "Ridicule with satire" .)