Sweetener caused gory cell mutation (8)
I believe the answer is:
glycerol
'sweetener caused' is the definition.
I can't judge whether this definition defines the answer.
'gory cell mutation' is the wordplay.
'mutation' is an anagram indicator.
'gory'+'cell'='gorycell'
'gorycell' with letters rearranged gives 'GLYCEROL'.
Can you help me to learn more?
(Other definitions for glycerol that I've seen before include "Cor! Gelly (anag.) -- a low-cal sweetener" , "sticky stuff" , "Syrupy liquid, a by-product of soap manufacture" .)