Tale from a small politician (5)
I believe the answer is:
story
'tale' is the definition.
(I know that story is a type of tale)
'a small politician' is the wordplay.
'a small' becomes 's' (abbreviation - e.g. clothes size).
'politician' becomes 'tory' (term for a Conservative Party politician).
's'+'tory'='STORY'
'from' is the link.
(Other definitions for story that I've seen before include "Rumour" , "See 10 and 19" , "Anecdote" , "Tale - lie" , "Narrative or account" .)