Gave about a pound for something worn (5)
I believe the answer is:
'something worn' is the definition.
I can't tell whether this definition defines the answer.
'gave about a pound' is the wordplay.
'gave' becomes 'paid' (paying is a kind of giving).
'about' is an insertion indicator.
'a pound' becomes 'L' (the pound sign is based on an L).
'paid' enclosing 'l' is 'PLAID'.
'for' is the link.
Can you help me to learn more?
(Other definitions for plaid that I've seen before include "Cloth with tartan pattern" , "Tartan-pattern cloth" , "Scots cloth - Welsh party" , "Tartan cloth, part of Highland dress" , "Scottish Highland fabric" .)