The most common and most likely answer to this crossword clue is the 11 plus 4 letter word ALTERNATIVE VOTE
I've seen this crossword clue in The Times
A
L
T
E
R
N
A
T
I
V
E
V
O
T
E
More clues leading to the result ALTERNATIVE VOTE
- Electoral system that may provide veto?
- Choosing system to change local time in Orkney bay
- A tentative lover’s foolish ranking of preferences
- Selective approach briefly used in Scandinavia
- Son comes in to reform illegal veto in electoral system
- Local choice behind change in selection process
- Electoral system briefly in favour
Buddy explains!
The straight part
We know that "Choosing system" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case choosing system = alternative vote.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.