Possible Clues:

• ''Oh damn their Celtic twilight,' Peter thought. 'Thank God I'm -.'' (Eric Linklater)
• Why gorse cannot go for the Viking
• See 24-Across
• These men were Vikings
• Like some paganism
• Difference between dive and diverse
• Viking
• Tongue right in the middle of face
• Certain Icelandic settlers
• From ancient Scandinavia