Possible Clues:

• Vehicle, with case finally inside, leaves from farm
• For instance, once popular Swedes about to come up -- or another vegetable
• Luggage taken in taxi back from Natalie Cole
• Corned beef go-with
• *Head of the produce section?
• Cole takes luggage in taxi close to Braintree
• Vegetable in vehicle getting black over time
• Plant vegetable
• A vegetable
• 6 across starts to return in the cage with the brass I.C.A.