The sort of seat one doesn't want to leave? (6)
I believe the answer is:
settle
'the sort of seat' is the definition.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for settle that I've seen before include "A sort of bench" , "Become established and pay debt" , "Finish fidgeting" , "Decide - colonise" , "Resolve; Yorkshire town" .)