Nairobian. Looks nothing like your letters must admit, yet, just wonder if they are all correct as Iron is in the word Nairobian + Nairobi is in Kenya- just an educated guess. Do not have the RT to know what the other clues are either. Only purchase a Telegraph on Saturday. Good luck, Bea :-)
Sorry Vegasmund. Of course it is Potassium. Know that K is potassium, too. Silvery white metal, atomic number 19- Potassium. Excuse me all!! Hugs, Bea :-)