Too much confidence in one's own depiction in image on a building (8)
I believe the answer is:
egomania
'too much confidence in one's own depiction' is the definition.
I can't judge whether this defines the answer.
'image on a building' is the wordplay.
'building' indicates anagramming the letters.
'image'+'on'+'a'='imageona'
'imageona' with letters rearranged gives 'EGOMANIA'.
'in' is the link.
Can you help me to learn more?
(Other definitions for egomania that I've seen before include "Obsessive self-centredness" , "self-centred obsession" , "Feeling very self-conscious" , "Morbid self-exaltation" , "Thinking of oneself" .)