Related Clues:

• Castle protector, maybe
• Fischer's castle
• Certain board member
• King protector, sometimes
• Orthogonally moving piece
• One on the front line
• One in line to be a queen?
• Piece next to a knight
• Patsy
• It can only go forward
• Least valuable chess piece
• Puppet
• End piece?
• One might be promoted
• King's frontman