Honour, in general, person who's supposedly never wrong (8)
I believe the answer is:
customer
'person who's supposedly never wrong' is the definition.
I can't judge whether this defines the answer.
'honour in general' is the wordplay.
'honour' becomes 'om' (Order of Merit).
'in' is an insertion indicator.
'general' becomes 'custer' (I've seen this before).
'om' going inside 'custer' is 'CUSTOMER'.
Can you help me to learn more?
(Other definitions for customer that I've seen before include "Shopper or client - always right" , "Rail passenger, nowadays" , "'Buyer, client (8)'" , "User of, eg, a shop" , "Person shopping" .)