Possible Clues:

• Hollywood film company
• Letters by a lion
• 'The Wizard of Oz studio'
• 'Grand' Vegas hotel
• Big film inits.
• Hepburn, Garbo and Gable employer, once
• Garbo and Gable employer, once
• ''Singin' in the Rain ''studio
• Frequent fight spot, with 'Grand'
• The Marx Bros. left Paramount for it