Related Clues:

• The fourth letter of "cancel," but not the first
• Cymbal sound?
• Cellar, but not collar, opening
• A Cyclops has just one
• Start of "celery" or "cymbal"
• Reef organism that doesn't have a hard skeleton
• Icy center?
• Component of cider but not cola?
• The first (but not the fourth) letter in "circle"