One politician is in, not entirely unfinished and free to proceed (9)
I believe the answer is:
unimpeded
'one politician is' is the definition.
I can't tell whether this defines the answer.
'not entirely unfinished and free to proceed' is the wordplay.
'not' becomes 'un' (prefix meaning 'not').
'entirely unfinished' becomes 'impede' (I can't justify this - if you can you should believe this answer much more).
'and' becomes 'too'.
'free' indicates named letters should be taken away.
'proceed' becomes 'do' (doing is a kind of proceeding).
'to'+'do'='todo'
'todo' with 'too' taken out is 'd'.
'un'+'impede'+'d'='UNIMPEDED'
'in' is the link.
Can you help me to learn more?
(Other definitions for unimpeded that I've seen before include "Not hindered or blocked" , "Without let or hindrance" , "Without check or obstruction" , "not delayed" .)