Crossword Genius

Powder used in dental clinics (4)

Ross

I believe the answer is:

talc

'powder' is the definition.
(I know that talc is a more specific form of the action powder)

'in dental clinics' is the wordplay.
'in' indicates a hidden word.
'TALC' can be found hidden inside 'dental clinics'.

'used' is the link.

(Other definitions for talc that I've seen before include "Soft mineral; powder" , "Softest mineral on Mohs hardness scale" , "Powdered substance" , "Soft white powder" , "Powdered mineral" .)

I've seen this clue in the Evening Standard.
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