Possible Clues:

• It's surrounded in albumin
• That soounds like a thingummy you'd find 16 down
• It's enveloped in white
• How yellow to make it sound as if the ox might get it in the neak!
• One soldiers may attack is yellow
• It's not white for the neck, by the sound of it
• Egg's 'yellow'
• Yellow, with a white surround
• How yellow so to sound in harness
• Sunny side in a diner