Related Clues:
- First word of KISS
- Get more service from
- Not spoil
- Reduce, __, recycle
- Don't waste, perhaps
- Securest part of a castle
- Avoid simply throwing away
- Opposite of spoil
- Go green, in a way
- Part of a green mantra
- Word often seen before "recycle"
- Don't spoil
- Practice conservation
- Retain in old castle tower?
- Retain or care for