Related Clues:

• Kettle sound
• Natl. registry org.
• Draft org.
• Object of S.D.S. protest
• Puncture sound
• It's got your no.
• Barbecue sound
• Snake sound
• Sound of a lit fuse
• Heckle, in a way
• Greet the villain
• Subj. of 60's protest
• Induction grp.
• Sound of disapproval
• Ophidian sound