Possible Clues:

• Perhaps one is just having a doze, but that's what you get from smoking
• That's what smoking gets for you - gets you sleepy
• Has smoking given one a little sleep?
• Is it smoking that has put one to sleep?
• After a smoke one might need a snooze
• Dried and smoked herring
• One drops off a fish
• One is sleeping after smoking
• That's what you get for smoking while you're asleep
• Being pickled, gone to sleep