Thought one had respected other people's feelings (10)
I believe the answer is:
considered
This could be a double definition.
'thought one' is the first definition.
'considered' can be an answer for 'thought' (considering is a kind of thinking). I'm not certain of the 'one' bit.
'respected other people's feelings' is the second definition.
'considered' can be an answer for 'respected' (I've seen this before). I'm not sure about the 'other people's feelings' bit.
'had' is the link.
Can you help me to learn more?
(Other definitions for considered that I've seen before include "Thought carefully about" , "Deliberated" , "Believed to be" , "Looked at" , "respected" .)