Dorothy is lifted, having worried up till now (2,4)
I believe the answer is:
to date
'up till now' is the definition.
(to date means up to the current time)
'dorothy is lifted having worried' is the wordplay.
'dorothy' becomes 'dot' (nickname for someone called Dorothy).
'is lifted' says the letters should be written backwards (going up in down clue).
'having' is a charade indicator (letters next to each other).
'worried' becomes 'ate' (something worrying may eat someone up).
'dot' reversed gives 'tod'.
'tod'+'ate'='TO DATE'
(Other definitions for to date that I've seen before include "Up until today" , "Amorous American's aim," , "Until this point in time" , "up to the present day" , "Up to this time - check calendar" .)