Crossword Puzzle One you can ride for big bucks?

Clue: One you can ride for big bucks?

Onetime presidential candidate on the Forbes 400 list (HROSSPEROT with 10 letters)
___ Romeo (foreign ride) (ALFA with 4 letters)
Ride through the Grand Canyon? (BURRO with 5 letters)
Grand Canyon ride (BURRO with 5 letters)
Foreign bucks (EUROS with 5 letters)
Biggie with bucks (FATCAT with 6 letters)
Young bucks (e.g. FAWNS with 5 letters)
Young does and bucks (FAWNS with 5 letters)
Bigwig's ride (LIMO with 4 letters)
Where Charlie may ride forever, in song (MTA with 3 letters)