Traveller not going back to school at Derby (6)
I believe the answer is:
repton
'school at derby' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'traveller not going back' is the wordplay.
'traveller' becomes 'rep' (travel company worker).
'going back' says the letters should be written backwards.
'not' reversed gives 'ton'.
'rep'+'ton'='REPTON'
'to' is the link.
Can you help me to learn more?
(Another definition for repton that I've seen is " English public school, founded 1557".)