Related Clues:

• Cattle unit
• Stream's source
• Canine cousin
• With 37-Across, hair accessory ... or a literal hint to 19-, 27-, 47- and 56-Across
• Go (toward)
• *Noodle or noggin
• Shoulders' partner
• Move (toward)
• A grinding tooth
• This, being over everything else, may also be 2 down
• Bray with it where the wick gets low on top
• S?
• Not, by the sound of it, in size or in the mouth
• Does the doctor get Laurence for backbiting?
• The man gets his father up on top