Possible Clues:

• Conrad converted Scotsman who is very harsh
• Very severe damage rain can do
• Very severe medic with a look over Scot
• Extremely unforgiving
• Incan road (anag) — extremely harsh
• Severe
• Cruel in a Conrad novel?
• Hard rain and storms keeping company inside
• Harsh Queen, eg, backpedals supported by Scotsman
• Overly harsh doctor has a trick with one case of abrasion