Stop giving away old heart medication (6)
I believe the answer is:
statin
'heart medication' is the definition.
(type of heart medication)
I don't understand the remainder of the clue.
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" .)