Unhappy interrogator runs away twice, becomes diplomat (10)
I believe the answer is:
negotiator
'diplomat' is the definition.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for negotiator that I've seen before include "One making deal" , "Seeker of compromise" , "One may circumvent obstacles" , "One trying to agree a compromise" , "One in discussions to reach an agreement" .)