A nylon-edged jug is more modern (5)
I believe the answer is:
newer
'more modern' is the definition.
('new' is associated in meaning with 'modern')
'a nylon-edged jug' is the wordplay.
'a nylon-edged' becomes 'n' (this could be a standard abbreviation of which I'm unaware).
'jug' becomes 'ewer' (type of vessel).
'n'+'ewer'='NEWER'
'is' is the link.
Can you help me to learn more?
(Other definitions for newer that I've seen before include "More current" , "More pristine or recently invented" , "Fresher or more novel" , "More modern" , "More recent" .)