Composer and lass eating cheese with last drop of Chianti (8)
I believe the answer is:
gabrieli
'composer' is the definition.
(I've seen this before)
'lass eating cheese with last drop of chianti' is the wordplay.
'lass' becomes 'gal' (both can mean a girl).
'eating' means one lot of letters goes inside another.
'cheese' becomes 'brie' (Brie is an example).
'with' is a charade indicator (letters next to each other).
'last drop of' says to take the final letters.
The last letter of 'chianti' is 'i'.
'gal' enclosing 'brie' is 'gabriel'.
'gabriel'+'i'='GABRIELI'
'and' acts as a link.
(Other definitions for gabrieli that I've seen before include "Andrea or Giovanni --, Venetian composer" , "composer, or two" , "Giovanni -, sixteenth-seventeenth century Venetian composer" .)