It gives one a boost (4-2-2)

I believe the answer is:

pick-me-up

(Other definitions for pick-me-up that I've seen before include "A tonic to restore health or relieve depression" , "Medicinal tonic" , "A restorative tonic drink" , "Stimulating drink" , "Stimulative drink" .)

I've seen this clue in The Guardian.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.