Possible Clues:

• 'Never look a .... ..... in the mouth'
• One whose mouth shouldn't be examined?
• Bit of equine trickery
• 'Never look a . . . . . . . . . in the mouth'
• Foresight (anag.)
• Arab offered God's energy under tree, climbing
• Foresight might suggest avoiding a dental examination
• Don't look one in the mouth
• One you shouldn't look in the mouth
• Something to accept without complaint