Delusion

12 clues
Pipe dream
False notion
False belief
Misconception
Self-deception
Snare's partner
Erroneous belief
Mistaken opinion
Aspect of paranoia
Fantasy world belief
It may be one of grandeur
Belief held in the face of all contrary evidence
Similar answers:
Abcletelevision
Abrasion
Abrasions
Abridgedversion
Academicsession
Accession
Acidvisionquest
Actofaggression
Adhesion
Adhesional
Adhesions
Adiscussion
Admission
Admissionaccomplished
Admissioncharge
Admissioncontrol
Admissionfreeit
Admissionimpossible
Admissionofquilt
Admissionpri