Choice example (5)

I believe the answer is:

other

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'choice' is the definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for other that I've seen before include "Not the one mentioned" , "Remaining" , "Different; alternate" , "Second" , "One may be significant" .)

I've seen this clue in The Globe and Mail and The Irish News.

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