Rash, hasty (9)
I believe the answer is:
impetuous
I believe this clue is a double definition.
'rash' is the first definition.
(I know that rash can be written as impetuous)
'hasty' is the second definition.
(thesaurus)
(Other definitions for impetuous that I've seen before include "Acting rashly" , "Hot-headed" , "Rash" , "Impulsive, hasty" .)