Fascinated by how one plotted (9)
I believe the answer is:
intrigued
This could be a double definition.
'fascinated' is the first definition.
('intrigue' can be a synonym of 'fascinate')
'plotted' is the second definition.
(intriguing is a kind of plotting)
'by how one' acts as a link.
I am not very happy about this link. Some or all of it may belong to one of the definitions.
Can you help me to learn more?
(Other definitions for intrigued that I've seen before include "Having curiosity aroused" , "Keenly interested" , "Becoming interested" .)