Related Clues:

• Due for a drop-off?
• Drug from poppies
• Ready for bed
• Nodding, perhaps
• Poppy derivative
• Ready for a nap
• Morphine, for one
• Ready to retire
• About to go out
• Narcotic drug
• Endorphin, basically
• Yawning, most likely
• Mind duller
• A Disney Dwarf
• Religion, in an oft-quoted metaphor