It's sweet, darling (5)

I believe the answer is:

sugar

I believe this is a double definition.

'it's sweet' is the first definition.
(sugar is sweet)

'darling' is the second definition.
(I've seen this in another clue)

(Other definitions for sugar that I've seen before include "White crystalline carbohydrate" , "Plantation product" , "flattery" , "Damn" , "Argus (anag.)" .)

I've seen this clue in The Mirror.

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