Crossword Genius

Break part of arm, did you say? (6)

Ross

I believe the answer is:

breach

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

'break' is the definition.
(I know that break can be written as breach)

'part of arm did you say?' is the wordplay.
I cannot really see how this works, but
'part' could be 'reach' (reach is a kind of part) and 'reach' is present in the answer.
A single letter 'b' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for breach that I've seen before include "Opening - quarrel" , "Gap made in a fortification" , "Rupture, rift" , "Violation of a promise" , "Opening -- infraction" .)

I've seen this clue in The Telegraph.
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