Official from Honolulu’s no coward on reflection (6)
I believe the answer is:
consul
'official' is the definition.
(consul is a kind of official)
'from honolulu's no coward on reflection' is the wordplay.
'from' indicates the answer is hidden within the clue.
'on reflection' says the letters should be written in reverse.
'lusnoc' can be found hidden inside 'honolulus no coward'.
'lusnoc' back-to-front is 'CONSUL'.
(Other definitions for consul that I've seen before include "Official representative of a state living abroad" , "The diplomat deals with commercial matters" , "Ambassador" , "Roman chief magistrate" , "Chief magistrate in ancient Rome" .)