More unfinished canapés, crackers and cheese (10)
I believe the answer is:
mascarpone
'cheese' is the definition.
(I've seen this in another clue)
'more unfinished canapes crackers' is the wordplay.
'unfinished' means to remove the last letter.
'crackers' is an anagram indicator (informal term for mad).
'more' with its last letter taken off is 'mor'.
'mor'+'canapes'='morcanapes'
'morcanapes' with letters rearranged gives 'MASCARPONE'.
'and' acts as a link.
(Other definitions for mascarpone that I've seen before include "Soft Italian cheese" , "Italian cream cheese" .)