Fish sandwiches Frenchman scoffing heading for Dieppe – worker at Versailles, perhaps? (8)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

definition refers to a possible worker at the Gardens of Versailles GAR="Fish" around RENE=René="Frenchman" which itself goes around ("scoffing") the head letter of D-[ieppe]