The most common and most likely answer to this crossword clue is the 10 letter word DESIGNATES
I've seen this crossword clue in The Guardian
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More clues leading to the result DESIGNATES
Buddy explains!

The straight part
We know that "Chooses" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case chooses = designates.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 DESIGNATES mean?
DESIGNATES verb- To mark out and make known; to point out; to indicate; to show; to distinguish by marks or description
- To call by a distinctive title; to name.
- To indicate or set apart for a purpose or duty; — with to or for; to designate an officer for or to the command of a post or station.