Related Clues:
- Very long Supergrass song?
- Awfully long stretch
- Phanerozoic, for one
- Individual bringing up rear for a very long time!
- Great spell
- MTV's '___ Flux'
- It feels like forever
- Interminable wait
- Extended period, hyperbolically
- Vast time stretch
- Really big stretch
- Long time and a bad one
- Two or more eras in geologic time
- A thousand million years
- Very long spell