It's easy to weave lies about a politician (6)
I believe the answer is:
simple
'it's easy' is the definition.
(similar in meaning)
'weave lies about a politician' is the wordplay.
'weave' is an anagram indicator.
'about' indicates putting letters inside.
'a politician' becomes 'MP' (Member of Parliament).
'lies' anagrammed gives 'sile'.
'sile' enclosing 'mp' is 'SIMPLE'.
'to' acts as a link.
(Other definitions for simple that I've seen before include "Penniless pie seeker" , "Naive" , "Easy; herb" , "half-witted" , "Easily done" .)