Possible Clues:

• Getting through to farms about ground that's always frozen
• By obtaining a degree, Robert, the poet, goes where it's always cold
• Oddball farmer consumed by tweet is unlikely to ever thaw out
• Arctic drilling challenge
• Ground never thawing
• The broken frame in the ice-bound poets
• Ground frozen for a long time
• Hairdos with some style - but understatedly 'cool'
• Haircuts set without middle layer always solid
• Hard layer finds way onto curly hairstyles