Article on etiquette's first making you old-fashioned (4)
I believe the answer is:
thee
'you old-fashioned' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'article on etiquette's first' is the wordplay.
'article' becomes 'the' (the definite article in English).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'etiquette's first' becomes 'e' (tst letter of 'etiquette').
'the'+'e'='THEE'
'making' is the link.
Can you help me to learn more?
(Other definitions for thee that I've seen before include "you many years ago" , "'U'" , "Old objective second person singular" , "Poetically you" , "Archaic form of 'you'" .)