Inexperienced local inhabitant losing time (5)
I believe the answer is:
naive
'inexperienced' is the definition.
('naive' can be similar in meaning to 'inexperienced')
'local inhabitant losing time' is the wordplay.
'local inhabitant' becomes 'native' (I've seen this before).
'losing' indicates named letters should be taken away.
'time' becomes 't'.
'native' with 't' taken out is 'NAIVE'.
(Other definitions for naive that I've seen before include "Inexperienced or gullible" , "Lacking sophistication" , "Jejune" , "Wet behind ears" , "Rather too simple and ingenuous" .)