Here cast your vote and get some tea (3)
I believe the answer is:
urn
'here cast your vote' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'and get some tea' is the wordplay.
'and get' becomes 'ur' (I am not sure about this - if you are sure you should believe this answer much more).
'some' says to take the centre.
'tea' becomes 'congo' (I've seen this before).
The centre of 'congo' is 'n'.
'ur'+'n'='URN'
Can you help me to learn more?
(Other definitions for urn that I've seen before include "Huge teapot" , "Burial vase" , "Run to get large jar" , "One carrying coffee or tea" , "Samovar, perhaps" .)