Answer: guideline

AnswerCrossword Clue
GUIDELINECalligrapher's aid
GUIDELINENotebook feature
GUIDELINERule
GUIDELINEProofreading mark.
GUIDELINECriterion for making a decision
GUIDELINERule of thumb
GUIDELINEPolicy feature
guidelineA general rule, principle, or piece of advice
guidelinea line drawn, or a rope, etc fixed, to act as a guide