Tonic, restorative (4-2-2)
I believe the answer is:
pick-me-up
This clue is a double definition.
'tonic' is the first definition.
(I know that pick-me-up is a type of tonic)
'restorative' is the second definition.
(pick-me-up is a kind of restorative)
(Other definitions for pick-me-up that I've seen before include "Stimulating drink" , "Stimulant" , "Stimulative drink" , "A restorative tonic drink" , "I could do with a lift" .)