Until this time (8)
![Ross](/clue/static/ross-mug.min.png)
'until this time' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for hitherto that I've seen before include "Up to this time" , "Up till now" , "So far" , "Previously" , "Heretofore (8" .)
(Other definitions for up to now that I've seen before include "Hitherto" , "So far" .)