Related Clues:

• Hit the sack
• Go to bed
• Quit working
• Call it a night
• Turn in for the night
• Stop working at 65, say
• Take out of circulation
• Put out to pasture
• Quit for good, jobwise
• Hang up one's cleats
• Conclude a career
• Leave one's post, possibly
• Hang it up, so to speak
• Quit using
• Head for bed