Related Clues:

• Suffix with "slug" or "song"
• Major outcry
• Ozz follower
• "Song" or "slug" attachment
• End of a celebration?
• Outdoor concert with many bands (abbr.)
• Multiple-band concert
• Weekend-long show
• Gathering of the Vibes is a Grateful Dead-inspired one
• Film add-on
• "Gab," "slug" or "song" ending
• End of Oktober?
• Suffix with "song" or "slug"
• Multiple-day music gathering, e.g
• Suffix with "song" or "lobster"