From Doha, the eccentric, rash person (7)
I believe the answer is:
hothead
'rash person' is the definition.
(hothead can mean a rash or impetuous person)
'from doha the' is the wordplay.
'from' is an anagram indicator (the anagram comes from the same letters).
'doha'+'the'='dohathe'
'dohathe' with letters rearranged gives 'HOTHEAD'.
'eccentric' is the link.
I am not very happy about this link. It may belong to another bit of the clue.
(Other definitions for hothead that I've seen before include "Fiery character" , "Impetuous irresponsible person" , "An impetuous person with warm cranium" , "Daredevil" , "Madcap" .)