Related Clues:

• Become clear, with "in"
• Founder
• Slope downward
• Pit of your stomach
• __ instinct
• Set, as the sun
• Succumb to quicksand
• Abdomen, so to speak
• Hole, as a putt
• Instinct source
• Washing-up place
• Instinctive, as a feeling
• Go down like a rock
• Like some instinctive reactions
• __ feeling