Does she make a big splash as a bather? (6)

I believe the answer is:

bertha

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'does she' is the definition.
'Bertha' can be an answer for 'she'. I am not sure about the 'does' bit.

'a big splash as a bather?' is the wordplay.
'bather' anagrams to 'BERTHA'.
However, I am not clear how the anagram is indicated.

'make' acts as a link.

Can you help me to learn more?

(Other definitions for bertha that I've seen before include "Woman's name" , "Big girl" , "The bar (anag.)" , "43-ton German howitzer, Big _____" , "Girl's name - big German WWI gun" .)

I've seen this clue in the Evening Standard.

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