Sweet person of means starts to express emotion (6)
I believe the answer is:
toffee
'sweet' is the definition.
(toffee is a kind of sweet)
'person of means starts to express emotion' is the wordplay.
'person of means' becomes 'toff' (toff can mean a rich or upper-class person).
'starts to' suggests taking the first letters.
The first letters of 'express emotion' is 'ee'.
'toff'+'ee'='TOFFEE'
(Other definitions for toffee that I've seen before include "Type of sweet" , "Confectionery made from sugar and butter" , "Chewy confectionery" , "Brittle confectionery" , "Chewy sweet" .)