Related Clues:

• Sound heard in a cave
• Delta follower
• Bounceback
• Mimicker
• Off-the-wall response?
• Comeback of a sort
• Chamber phenomenon
• Yodeler's feedback
• Charades player, at times
• Alpine reverberation
• Off-the-wall answer
• Back talk?
• Nymph of myth
• Identical response
• Sonic ricochet