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I'm after a lift, and this could be just the tonic! (4-2-2)

Ross

I believe the answer is:

pick-me-up

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'tonic' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

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(Other definitions for pick-me-up that I've seen before include "Stimulant" , "I could do with a lift" , "Stimulative drink" , "Medicinal tonic" , "A restorative tonic drink" .)

I've seen this clue in The Independent.
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