Possible Clues:

• Round thick piece of beef fillet
• Ron used to cook steak
• Cut short trip and so retreat northwards
• Steak
• Round thick fillet cut
• Having eaten nothing, had recourse to extra large steak
• Meat that's so under cooked, to start with
• Steak done differently in French town
• Rossini's 2 duets or no other
• Thick slice changed direction, constraining ball thus to go wrong way