Cures infection and composes short biography in attic (10)
I believe the answer is:
antibiotic
'attic' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps you can see a link between them that I don't see?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for antibiotic that I've seen before include "Substance that destroys bacteria" , "Medicine destroying micro-organisms" , "Infection treatment" , "Medication" , "Remedy" .)