Possible Clues:

• Jacket for a sailor
• Does the whistler ever turn up with this sort of jacket?
• Cigarette containing cannabis - jacket
• Is the jacket about to get the start of 31 across in a mess?
• Sailor's jacket or marijuana cigarette
• A wool jacket; a spliff
• Close-fitting coat
• Referee almost dopey from drugged cigarette
• Certain cigarette, slangily
• The one, perhaps, that ties the knot for the jacket