One addressing autumn ending of off-peak fare (5)
I believe the answer is:
keats
'one addressing autumn ending of' is the definition.
The definition suggests a singular noun which matches the answer.
'peak fare' is the wordplay.
'peak' becomes 'k' (I can't explain this - if you can you should believe this answer much more).
'fare' becomes 'eats' (eats can mean food).
'k'+'eats'='KEATS'
'off' is the link.
Can you help me to learn more?
(Other definitions for keats that I've seen before include "John --, Romantic poet" , "Author of Endymion and Ode to a Nightingale" , "Early 19th century poet" , "English odist" , "Ode to Autumn poet" .)