It's sweet, and there's nought that might be mistaken for it! (6)
I believe the answer is:
nougat
'it's sweet' is the definition.
(nougat is a kind of sweet)
'there's nought that might be mistaken for it' is the wordplay.
I cannot really understand how this works, but
'there's' could be 'n' (I've seen this in other clues) and 'n' is located in the answer.
'nought' could be 'o' (O resembles 0) and 'o' is located in the answer.
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found within the answer.
This explanation may well be incorrect...
'and' is the link.
Can you help me to learn more?
(Other definitions for nougat that I've seen before include "Sweet made from honey, egg white and nuts" , "Type of sweet" , "French confection" , "confectionery" , "Honeyed sweet" .)