Girl out of breath? (6)

I believe the answer is:

bertha

'girl' is the definition.

'of breath?' is the wordplay.
'of' indicates an anagram (the answer comes from or 'of' the letters).
'breath' is an anagram of 'BERTHA'.

'out' acts as a link.

(Other definitions for bertha that I've seen before include "collar" , "Woman's name" , "big woman?" , "The bar (anag.)" , "Girl's name - big German WWI gun" .)

I've seen this clue in the Evening Standard.

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