Something used to dry skin in antenatal clinics (4)
I believe the answer is:
'something used to dry skin' is the definition.
(talc may be applied to dry skin)
'in antenatal clinics' is the wordplay.
'in' indicates a hidden word.
'TALC' can be found hidden inside 'antenatal clinics'.
(Other definitions for talc that I've seen before include "Magnesium silicate powder" , "After-bath powder" , "Cosmetic powder" , "Soft stuff" , "Toilet powder - mica" .)