Exotic, eschewing new system of morals (5)
I believe the answer is:
ethic
'of morals' is the definition.
(I've seen this before)
'exotic eschewing new' is the wordplay.
'exotic' becomes 'ethnic' (I've seen this before).
'eschewing' suggests deleting specific letters.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'ethnic' with 'n' taken away is 'ETHIC'.
'system' acts as a link.
I am not very happy about this link. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for ethic that I've seen before include "System of principles" , "Principles accepted by a social group" , "Moral rule" , "type of behaviour" , "An unusual factor in morals" .)