Possible Clues:

• Southern sky less hot: put this on?
• Heavy jersey
• Cool weather wear
• As we arranged, Master Sam dropped back the garment
• Knitted upper garment
• It may be worn when a wester's got up
• Re waste: it's a garment
• A letter may be attached to it
• Jersey has primarily sunny climate, but not hot
• Pull this over one who's hot