Honourable peer (5)
I believe the answer is:
noble
This clue is a double definition.
'honourable' is the first definition.
(similar in meaning)
'peer' is the second definition.
(I've seen this before)
(Other definitions for noble that I've seen before include "Illustrious, peer" , "August" , "Possibly count" , "Eminent" , "aristocrat, maybe" .)