Related Clues:
- Drained glass
- Bleak gas gauge level
- Loneliness parents feel when their children leave home
- Carrying no passengers regularly seems petty
- Word that can precede the last parts of 20- and 57-Across and 11- and 35-Down
- Like bottles for recycling
- Insincere, as a promise
- Opposite of filled
- Vain attempt you keep hidden
- Like some tanks and promises
- Stop payment - without pantos this would be meaningless
- Containing naught
- Running on __
- Vacuous English politician facing vacuous Tory
- What 'E' may mean