Crossword Genius

Money yields initially exchanged for medicine (5,5)


I believe the answer is:

cough drops

I'm a little stuck... Click here to teach me more about this clue!

'money yields' is the definition.
Although both the answer and definition are plural nouns, I cannot understand how one could define the other.

I can't explain the rest of the clue.

Can you help me to learn more?

I've seen this clue in The Independent.
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