One politician told porkies, it's suggested (7)
I believe the answer is:
implied
'suggested' is the definition.
(implying is a kind of suggesting)
'one politician told porkies' is the wordplay.
'one' becomes 'i' (Roman numeral).
'politician' becomes 'MP' (Member of Parliament).
'told porkies' becomes 'lied' (porky pie is Cockney rhyming slang for lie).
'i'+'mp'+'lied'='IMPLIED'
'it's' is the link.
(Other definitions for implied that I've seen before include "Not directly declared" , "Insinuated, hinted" , "Unspoken" , "Suggested; not explicit" , "Tacit" .)