Local resident more unpleasant about prisoner (8)
I believe the answer is:
villager
'local' is the definition.
'more unpleasant about prisoner' is the wordplay.
'more unpleasant' becomes 'viler' ('vile' can be a synonym of 'unpleasant').
'about' is an insertion indicator.
'prisoner' becomes 'lag' (I've seen this before).
'viler' going around 'lag' is 'VILLAGER'.
'resident' acts as a link.
This may not be correct. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for villager that I've seen before include "Country dweller" , "Small town dweller" , "Inhabitant of a small settlement" , "Rural dweller" , "Denizen of a hamlet" .)