Tart flavouring a little bit sweet (5,4)

I believe the answer is:

lemon drop

'sweet' is the definition.
(type of sweet)

'tart flavouring a little bit' is the wordplay.
'tart flavouring' becomes 'lemon' (lemon is a tart flavour).
'a little bit' becomes 'drop' (I've seen this in another clue).
'lemon'+'drop'='LEMON-DROP'

(Another definition for lemon drop that I've seen is " Fruit sweet".)

I've seen this clue in The Guardian.

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