Cathedral on verge of collapse? That’s fishy (4)
I believe the answer is:
eely
'fishy' is the definition.
Both the answer and definition are adjectives.
Perhaps you can see an association between them that I can't see?
'cathedral on verge of collapse?' is the wordplay.
'cathedral' becomes 'ely' (cathedral city in Cambridgeshire).
'on' is a charade indicator (letters next to each other).
'verge of collapse?' becomes 'e' (I can't explain this - if you can you should give a lot more credence to this answer).
'ely' after 'e' is 'EELY'.
'that's' is the link.
Can you help me to learn more?
(Other definitions for eely that I've seen before include "Difficult to get hold of" , "Like a slippery catch" .)