John briefly upset George perhaps (5)
I believe the answer is:
eliot
'john' is the definition.
Both the definition and answer are singular nouns.
Perhaps you can see a link between them that I can't see?
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for eliot that I've seen before include "British poet, d. 1965" , "Female novelist" , "Middlemarch author" , "Practical Cats author" , "George - - (novelist)" .)