 Up to half of the answers may be "dictionary words"  and its standard reference, "The Chambers Dictionary", is an essential aid for most solvers.However, a much lower percentage of unchecked letters – those that appear in only one answer – helps to alleviate this, as does the rigour with which the clues are constructed.Azed is a strict Ximenean, a stickler for grammatical and syntactical soundness in clues.