Related Clues:
- Power at mains switch
- Diamond pins?
- They support the sovereign, for example — the head of state
- Unflagging vigour provides way to get a bird
- Ability to keep going
- Ability to sustain prolonged effort
- Trouser parts
- Pants fillers
- Ability to last
- Grand piano trio
- Horrible stain covers morning in a show of endurance
- Pins with 11
- Centipede's features
- Hose fillers?
- Marathoner's asset