Settle in amongst citizens, conceivably (8)
I believe the answer is:
ensconce
'settle' is the definition.
('ensconce' can be a synonym of 'settle')
'in amongst citizens conceivably' is the wordplay.
'in' indicates the answer is hidden within the clue.
'ENSCONCE' is hidden within 'amongst citizens conceivably'.
(Other definitions for ensconce that I've seen before include "Firmly establish" , "Settle comfortably, establish" , "Fix firmly" , "hide" , "Establish (oneself in a comfortable safe place)" .)