Confectioner’s thick sweet paste (7)

I believe the answer is:

fondant

(Other definitions for fondant that I've seen before include "Thick creamy sugar paste" , "Thick sugar paste used for icing cakes" , "Sweet paste of sugar, water, and flavouring" , "Soft sweet" , "Sugary paste for sweets" .)

I've seen this clue in The Times.

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