The most common and most likely answer to this crossword clue is the 10 letter word TWO-HANDER
I've seen this crossword clue in Independent
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More clues leading to the result TWO-HANDER
Buddy explains!
The straight part
We know that "Just a brace" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case just a brace = two-hander.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 TWO-HANDER mean?
TWO-HANDER noun- Two-handed backhand.
- A play, film, or television programme with only two main characters.
- A two-handed sword.
- A food item requiring two hands to eat.