The crossword solution for the term 'Self-Esteem to a Fault' is 'Egomania', which is defined as an excessive and exaggerated sense of self-importance. It is a mental disorder characterized by an inflated sense of self-worth, often accompanied by grandiose ideas and an obsessive preoccupation with oneself. Egomaniacs are often seen as arrogant, selfish, and narcissistic, and they tend to lack empathy for others.