Possible Clues:

• Having lunch
• Taking courses?
• It's wrong, according to 18 6, to give apple to genie
• Out to lunch, say
• What one might be doing out of a tine with a tin inside
• That makes the cockney hot - and full
• What we may be doing, for instance, about what comes out of a tin in here
• Gastronome's passion
• Of course that's the thing to do
• Taking, of course, a can in this