One would feel put out to be treated so (7)
I believe the answer is:
ejected
'one would feel' is the definition.
I can't tell whether this definition defines the answer.
'put out to be treated so' is the wordplay.
'put out' becomes 'eject' (I've seen this in another clue).
'to be treated so' becomes 'ed' (I can't explain this - if you can you should believe this answer much more).
'eject'+'ed'='EJECTED'
Can you help me to learn more?
(Other definitions for ejected that I've seen before include "Ousted" , "Thrust out" , "Evicted" , "Expelled, booted out" , "Forced out" .)