Restorative hitch-hiker's request?
I believe the answer is:
pick-me-up
'restorative' is the definition.
(pick-me-up is a kind of restorative)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for pick-me-up that I've seen before include "Stimulative drink" , "I could do with a lift" , "A tonic to restore health or relieve depression" , "Stimulant" , "Stimulating drink" .)