Related Clues:
- Philosopher thus keeps almost closed
- Is lacking compassion in backing those in deadlock
- Imperturbable person
- Cool sort in trips to Iceland
- Impassive person
- Like the planet Hoth in 'The Empire Strikes Back'
- Cool type in expeditions to iceberg
- Cool selection of cakes to ice
- Phlegmatic type almost shut in thus
- Scot free around island for one from School of Philosophy
- Wintry, in a way
- Unlikely to explode?
- One displaying a 17 Across
- Frigid and slippery
- Slippery, as a winter road