Wonderful cat, just not ordinary (8)
I believe the answer is:
heavenly
'wonderful' is the definition.
(I've seen this before)
'cat just not ordinary' is the wordplay.
I cannot really understand how this works, but
'cat' could be 'heave' (heaving is a kind of catting) and 'heave' is found within the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for heavenly that I've seen before include "Blissful" , "Divine" , "Wonderful" , "Celestial" , "Glorious" .)