Crossword Genius

A boring couple (5)

Ross

I believe the answer is:

brace

I'm a little stuck... Click here to teach me more about this clue!

This clue might be a double definition.

'a boring' is the first definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'couple' is the second definition.
(brace can mean a pair of something)

Can you help me to learn more?

(Other definitions for brace that I've seen before include "Steady; pair" , "Two - supporter" , "Secure" , "Pair; hand drill" , "Pair of game-birds" .)

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