Tonic request by litter? (4-2-2)
I believe the answer is:
pick-me-up
'tonic' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for pick-me-up that I've seen before include "Medicinal tonic" , "Stimulative drink" , "I could do with a lift" , "A restorative tonic drink" , "A tonic to restore health or relieve depression" .)