Enid’s order is derogatory (5)
I believe the answer is:
snide
'derogatory' is the definition.
(I've seen this before)
'enid's order' is the wordplay.
'order' indicates an anagram.
'enids' is an anagram of 'SNIDE'.
'is' acts as a link.
(Other definitions for snide that I've seen before include "Sneering in a sly way - dines out on it" , "Dines (anag.)" , "Sarcastic" , "Derogatory, sneering" , "Indirectly mocking" .)