Stop giving away old heart medication (6)

I believe the answer is:

statin

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'heart medication' is the definition.
(type of heart medication)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for statin that I've seen before include "Drug given to reduce blood cholesterol" , "Cholesterol-reducing drug" , "Cholesterol-lowering drug" , "Drug reducing cholesterol" .)

I've seen this clue in The Independent.

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