Related Clues:
- Tone down, as a color
- Trombone insert
- Unable to speak to soul mate, also missing
- Silence, as a Twitter user
- Sound-squelching button
- Button whose image may contain an X
- Silencing button
- Teleconferencing button
- Couch potato's pick
- Zoom call option
- Remote's volume-off button
- Sound off?
- Ad-silencing button
- Energy corporation backed without comment?
- Remote's sound-stopping button