Related Clues:
- Abbr. near a 0
- 7, on older phones
- Drive-in theater draw ... with a literal hint to 4- and 21-Down
- Neighbor of some stars
- 7, on old phones
- Abbr. above 0 on a phone
- Letters by the pound
- Trigram on rotary phones
- Letters under TUV, perhaps
- Letters below TUV
- Dial button sharing the '0'
- Letters by 0
- Telephone keypad abbr
- Switchboard attendant: Abbr
- Trio on older phones