Possible Clues:

• At first, articles will nestle in beard
• Beard grown on a farm?
• Bristle of grain
• Stiff bristle on grasses
• Stiff bristle growing from an ear of barley, for example
• Bristlelike grain appendage
• -- hair, bristly hair in intermediate layer of fur in some mammals
• Beard growing from barley or other cereals and grasses
• Bristle now with anger initially, flipping
• A beard or bristle of barley