I can be yours for a herbal tea?
I believe the answer is:
pick-me-up
'a herbal tea?' is the definition.
Although both the answer and definition are singular nouns, I cannot see how they can define each other.
'i can be yours' is the wordplay.
I cannot really see how this works, but
'i' could be 'me' and 'me' is found in the answer.
The remaining letters 'pickup' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
'for' acts as a link.
Can you help me to learn more?
(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" .)