Breathless, she can show poise (6)

I believe the answer is:

sophie

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'breathless she' is the definition.
'sophie' can be an answer for 'she' (I've seen this before). I am unsure of the 'breathless' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for sophie that I've seen before include "Dahl perhaps" , "Hope is confused for this girl" , "--'s Choice, novel by William Styron" , "Girl's name" .)

I've seen this clue in the Evening Standard.

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