CasimirXC1. The letters do not need to be anagrammed. Assuming you have the correct value of the unclued entry, simply follow what the preamble says about taking each pair and their remainders, converting to letters appropriately and you will end up with a string of letters, 38 in total. The string seems to not make sense initially but, after a few letters, whole words will appear, interspersed with more apparently strings of random letters. Persevere, you will enjoy the result.