It's sweet and sounds uplifting. (6)
I believe the answer is:
raisin
'it's sweet' is the definition.
I know that 'sweet' relates to this answer.
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for raisin that I've seen before include "Dried 18" , "Fruit for the Christmas cake" , "sultana, say" , "Large dried grape" , "An iris (anag)" .)