Related Clues:

• Puts one's initials on
• Gives a thumbs-up sign
• Rubber stamps
• Gives approval to
• Assents, slangily
• Doesn't nix
• Good-to-go signals
• Gives one's approval to
• Checks off on
• Approves, informally
• Letters of approval?
• Approves, slangily
• Pointer-to-thumb gestures
• Passes some task on after retiring
• Lets through