Every direction but south: that's unusual (3)
I believe the answer is:
new
'unusual' is the definition.
Both the answer and definition are adjectives. Perhaps there's a link between them I don't understand?
'every direction but south' is the wordplay.
I cannot quite see how this works, but
'direction' could be 'ne' (NE is an example) and 'ne' is located in the answer.
A single letter 'w' remains which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for new that I've seen before include "Modern" , "Not previously used" , "Recently made, etc" , "'Fresh, novel (3)'" , "and 28 and 29: The 365th day" .)