Related Clues:

• Sleepy river shown in drawing
• Bound to come across resistance, though exhausted
• Bound to cross over river that's not fresh
• Made an effort to promote one, being exhausted
• Sleepy even around mid-afternoon
• Attempted shifting resistance to the right, worn out
• Sorely tried and weary
• Stale when married? That's about right
• Ready for a snooze
• Bound, around end of supper, to be ready for bed?
• Done in time to replace leader in broadcast
• Like me, when I can't finish this-*snores*
• Sick partner?
• Like sleepy people or cars
• Like many knock-knock jokes