FA rubbish about clubs mogul (3,3)
I believe the answer is:
'mogul' is the definition.
Both the answer and definition are singular nouns.
Maybe they are linked in a way I don't understand?
'fa rubbish about clubs'' is the wordplay.
'rubbish' becomes 'tat' (low-quality items or material).
'about' indicates putting letters inside.
'clubs'' becomes 'c' (abbreviation used in card games such as bridge).
'tat' placed around 'c' is 'tcat'.
Can you help me to learn more?
(Other definitions for fat cat that I've seen before include "Moneybags as an obese feline" , "Wealthy person like obese feline" , "Wealthy person like obese beline" , "(Obscenely) wealthy businessman" , "Someone (undeservedly?) rich in business" .)