Shock vote for right providing unknown (9)
I believe the answer is:
electrify
'shock' is the definition.
(I've seen this before)
'vote for right providing unknown' is the wordplay.
'vote for' becomes 'elect' (I've seen this before).
'right' becomes 'r' (abbreviation).
'providing' becomes 'if' (eg 'providing it's sunny' means 'if it's sunny').
'unknown' becomes 'y' (algebra).
'elect'+'r'+'if'+'y'='ELECTRIFY'
(Other definitions for electrify that I've seen before include "Excite intensely" , "Fire" , "Galvanise - animate" , "Supply power to; shock, thrill" , "Cause thrilling excitement in (someone)" .)