Such blondes can be very sweet (5)

I believe the answer is:

honey

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'sweet' is the definition.
(thesaurus)

I don't understand how the remainder of the clue works.

(Other definitions for honey that I've seen before include "Made by bees from nectar" , "Food from hive" , "sweet thing" , "Sweet food" , "Sweet product of insects" .)

I've seen this clue in the Evening Standard.

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