Chosen Republican regularly teases voter (9)
I believe the answer is:
electress
'voter' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's an association between them I don't understand?
'chosen republican regularly teases' is the wordplay.
'chosen' becomes 'elect' ('elect' as an adjective can mean chosen).
'republican' becomes 'R' (political abbreviation).
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
The alternating letters of 'teases' are 'ess'.
'elect'+'r'+'ess'='ELECTRESS'
Can you help me to learn more?
(Other definitions for electress that I've seen before include "George I's mother was Sophia, -- of Hanover" , "governor's wife" , "she may make one cross" .)