### Clue: Writer turning up to probe fat cat (7)
### Answer: LEOPARD 
 ### Explanation: Definition: cat
  Reversal(*turning up*, in a down clue) of POE(Edgar Allan, American Gothic *writer*) in(*to probe*) LARD(rendered *fat*, especially from pork…or it could be excess fat on a person's body, with related rude names for the person).