Possible Clues:

• Frodo urgently conceals scent
• Scent ... Cologne, it's said
• In part, Quasimodo urgently produced a stink
• Scent you reportedly lost after crossing Atlantic?
• Oxygen dismal in air
• Bouquet old rogue oddly presented to king
• Old forbidding smell
• Beginning to object over unfriendly atmosphere
• The Telegraph's hosting party, getting bouquet
• Stench of Iberian river, bubble rising to the surface