Clue: Setter about to eat £25 Caesar salad, perhaps (6)
Answer: EPONYM
Explanation: Definition: Caesar salad, perhaps
 **Reversal of**(… about) ME(the setter, using the self-referential pronoun) **containing**(to eat) PONY(slang for the sum of £25).
Defn: A thing named after someone, an example being/perhaps "Caesar salad".