Awfully free conclusion in strange vote (10)
I believe the answer is:
referendum
'vote' is the definition.
(I know that referendum is a type of vote)
'awfully free conclusion in strange' is the wordplay.
'awfully' indicates an anagram.
'conclusion' becomes 'end' (something's conclusion is its end).
'in' means one lot of letters goes inside another.
'strange' becomes 'rum' (synonyms).
'free' is an anagram of 'efer'.
'efer'+'end'='eferend'
'eferend' placed into 'rum' is 'REFERENDUM'.
(Other definitions for referendum that I've seen before include "Public vote" , "General vote on a single question" , "ballot" , "popular vote" , "Plebiscite" .)