"Three Sisters” sister (4)

I think it could be either:

Which length description are you looking for?:

olga

'three sisters sister' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for olga that I've seen before include "Russian girl's name, anagram of ..." , "Lady" , "Slavic girl's name" , "Could be Russian girl" .)

I've seen this clue in the King Feature Syndicate.

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