Leave-taking from a passenger in good spirits (8)
I believe the answer is:
farewell
'leave-taking' is the definition.
(synonyms)
'a passenger in good spirits' is the wordplay.
'a passenger' becomes 'fare' (fare is a kind of passenger).
'in good spirits' becomes 'well' (I can't explain this - if you can you should give a lot more credence to this answer).
'fare'+'well'='FAREWELL'
'from' is the link.
Can you help me to learn more?
(Other definitions for farewell that I've seen before include "Cape at the southernmost point of Greenland" , "Goodbye, hope you get on" , "symphony" , "Departure" , "Archaic goodbye or leave-taking" .)