Sentence:  For example, I did not follow a <WSD>Ximenean</WSD> rule that a member of a larger class cannot be used to define the class itself (one poster brought this up). 
Meaning of the word marked with <WSD> tags:  Of or pertaining to the cryptic crossword style used and defined by "Ximenes" ((Derrick Somerset Macnutt)), whereby an acceptable cryptic clue must have a precise definition, a fair and strictly grammatical subsidiary indication, and no redundant elements beyond these.