At the weekend, it's what one may wear (3)
I believe the answer is:
kit
'one may wear' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see an association between them that I can't see?
'at the weekend it's' is the wordplay.
'at' is a charade indicator (letters next to each other).
'the weekend' becomes 'k' (I've seen this in other clues).
'k' next to 'it' is 'KIT'.
'what' acts as a link.
Can you help me to learn more?
(Other definitions for kit that I've seen before include "Necessary equipment" , "Set of articles or tools" , "Old song 'Pack up your troubles in your old . . . bag'" , "Equipment, clothing" , "Young cat" .)