Medicinal or cosmetic, they can make you scream! (6)

I believe the answer is:

creams

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'medicinal or cosmetic they' is the definition.
The definition suggests an adverb but the answer is not.

'can make you scream' is the wordplay.
'can make you' indicates anagramming the letters.
'scream' anagrammed gives 'CREAMS'.

Can you help me to learn more?

(Other definitions for creams that I've seen before include "biscuits" , "Takes the best" .)

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