Possible Clues:

• Inappropriate solution when one is dog-tired?
• Tom read in the racing pages, Forty Winks could make a dream bet!
• The rest of our pets?
• Forty winks (for moggy?)
• Pa can't get a wink of sleep
• Long account upset sleep
• Short time out
• Brief doze
• Top worker comes back in for a doze
• Caught a worker retiring on the quiet to have forty winks