In more ways than one, I'm clued up (4)
I believe the answer is:
wise
'in' is the definition.
Both the definition and answer are adjectives. Perhaps there's a link between them I don't understand?
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for wise that I've seen before include "Old way" , "comedian" , "` `A word to the .... is enough' '" , "Astute" , "Showing sagacity" .)