The most common and most likely answer to this crossword clue is the 7 letter word ELECTOR
I've seen this crossword clue in The Times
E
L
E
C
T
O
R
More clues leading to the result ELECTOR
- European Court function is set up to protect voter
- Old German prince’s shocking treatment, in part after rising
- Voter part reversed about spinning etc.
- German prince is English reader
- Hannibal speaking on first of elephants he chooses
- One helps to get a seat for someone standing
- One who votes for the ultimate reader
- Shocking treatment in part upset old prince
- Constituent ingredient of carrot/celery turnover!
- One who makes one cross with his choice
Buddy explains!

The straight part
We know that "Voter" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case voter = elector.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does ELECTOR mean?
ELECTOR noun- A person eligible to vote in an election; a member of an electorate, a voter.