Up until now
(Another definition for heretofore that I've seen is " Up to now".)
'up until now' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for yet that I've seen before include "To this time, nevertheless" , "Though; still" , "Still, even" , "Up till now" , "Still, so far" .)
'up until now' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for to date that I've seen before include "Up to the present time (2.4)" , "Up until today" , "up to the present day" , "Until this point in time" , "Amorous American's aim," .)