Related Clues:
- Recreational area
- Sergeant perhaps engaged in programme in open space at Waterloo?
- Leave one's car (in a green space?)
- Temporarily leave recreation ground
- Meeting place for many on racetrack
- Place in New York City?
- Place to picnic
- Large area in, eg, railway station
- Tory hunt lobby
- New York's Washington Square ___
- PRNDL part
- Gears are locked in it
- Way to prison?
- Educational opportunity for prisoners?
- Linkin ___