A two-word phrase for speedy vehicles in a competition. Keep in mind: The first word may be at the bottom.
Reveal top + bottom answer and reasoning
Answer: RACE CARS
Top half: RACE - RACE is the first half of "race cars", the top + bottom answer for the shared final clue: "A two-word phrase for speedy vehicles in a competition. Keep in mind: The first word may be at the bottom".
Bottom half: CARS - CARS completes "race cars", so the top and bottom rows answer the shared final clue together.