"Three Sisters” sister (5)
'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" .)
'three sisters sister' is the definition.
(I've seen this in another clue)
This is the entire clue.