She's sweet (5)
I believe the answer is:
candy
I believe this clue is a double definition.
'she's' is the first definition.
'sweet' is the second definition.
(I know that candy is a type of sweet)
(Other definitions for candy that I've seen before include "American confectionary" , "Girl's name (diminutive)" , "Sugary sweet" , "Sweet (US)" , "Crystallised sugar; US sweets" .)