Related Clues:
- Functional, operational
- Ready for service, nuns gambolled every now and then
- Worth keeping around
- Dulce et ___ (Horatian maxim)
- Worth using
- Like good tools
- Coming in handy
- Able to be implemented
- Practicable round safety device
- Unknown in City to quit permissible working
- Frequent companion of Q, in Scrabble
- No good sacking leader to be profitable
- Description of an item that can be put to a purpose
- Posh fur fit for purpose
- Q's Scrabble partner, often