Wealthy businessman's oversized Jaguar? (3,3)
I believe the answer is:
fat cat
'wealthy businessman's' is the definition.
(I've seen this before)
'oversized jaguar?' is the wordplay.
'oversized' becomes 'fat' (I can't explain this - if you can you should believe this answer much more).
'jaguar?' becomes 'cat' (jaguar is a kind of cat).
'fat'+'cat'='FAT CAT'
Can you help me to learn more?
(Other definitions for fat cat that I've seen before include "Magnate" , "Wealthy and powerful person (informal)" , "Rich person or obese feline" , "Rich man" , "Overpaid industrialist" .)