Possible Clues:

• Morse: character associated with Lewis
• Animal in a Beatles title
• Carpenter's pal, in rhyme
• Morse, perhaps, involving Lewis at first in fight over us
• Aquatic, web-footed, carnivorous mammal
• Parts of marine mammal found in Russia and Wales
• Whiskery beast was outside front of local before game
• Tusked aquatic mammal
• Right statute upset US Arctic dweller
• Ungainly creature observed holding page locator up