Settled in a resolute way (10)
I believe the answer is:
determined
'settled' is the definition.
('determine' can be a synonym of 'settle')
'in a resolute way' is the wordplay.
I cannot quite understand how this works, but
'in' is within the answer.
'way' could be 'r' (abbreviation for right) and 'r' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for determined that I've seen before include "firm" , "Resolved" , "Firmly decided" , "Decided - resolute" , "With full strength and concentration" .)