Afternoon steeped in tender loving care forms post-balneal treat? (4)

I believe the answer is:

talc

(Other definitions for talc that I've seen before include "Softest substance in Mohs scale of hardness" , "Fragrant powder" , "Mineral used as a toiletry" , "Magnesium silicate powder" , "(Mineral providing) powder" .)

I've seen this clue in The Times.

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