Chap’s not at liberty to accept unknown supplier of sugar or butter (9)
I believe the answer is:
sycophant
'butter' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'chap's not at liberty to accept unknown supplier of sugar' is the wordplay.
I cannot really see how this works, but
'not' could be 'nt' (synonyms) and 'nt' is found within the answer.
'unknown' could be 'y' (algebra) and 'y' is located in the answer.
'of' could be 'o' and 'o' is present in the answer.
an anagram of 'chap' is 'cpha' which is within the remaining letters.
A single letter 's' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...
'or' acts as a link.
Can you help me to learn more?
(Other definitions for sycophant that I've seen before include "obsequious one" , "Creep" , "Crawler, toady" , "Servile flatterer" , "Austen's Mr Collins?" .)