4d. Bonco or Bunko? 29a. Wide-brimmed medieval steel helmets, also called kettle hats (7-2-3) Chapeaux de fer? Too many letters. Even if singular, still does not fit with 18d. (I have luteous). svp.
Both definitions fit the clue ..so I think they have to allow for alt spellings ..but you would think they would put that if they have sourced the crossword correctly .
Also..I have just looked at my Chambers and am inclined to go with Bunko ...as they just say "See Bunko " when looking at Bunco and it is a definition ..so I think you have go to with a definition rather than a "see" .