Possible Clues:

• Drug producing torpor
• Drug needed on Arctic manoeuvres
• A number of disaffected Roman Catholics don't use 'shalom' in letters
• Northern ocean hides love which could give ultimate 13 15
• Sedative
• Nitrogen and oxygen in frozen drug
• Ran up to bed with chopped ice — that fights pain
• Drug causing numbness and drowsiness
• Numbing area up north inhabited by nothing after November
• Opiate