Offended salesman shouted, losing equanimity finally (8)
I believe the answer is:
repelled
'offended' is the definition.
The definition and answer can be both to do with human feelings as well as being past participle verbs.
Maybe you can see a link between them that I don't see?
'salesman shouted losing equanimity finally' is the wordplay.
I cannot really see how this works, but
'salesman' could be 'rep' (I've seen this before) and 'rep' is found in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for repelled that I've seen before include "Drove away" , "Forced or drove back" , "Disgusted or drove back" , "Driven back" , "Caused disgust" .)