Ruse native maybe's done in lab with airgun (9)
I believe the answer is:
bulgarian
'ruse native maybe's' is the definition.
(Ruse is a city in Bulgaria)
'done in lab with airgun' is the wordplay.
'done in' is an anagram indicator (done in can mean worn out).
'with' is a charade indicator (letters next to each other).
'lab' after 'airgun' is 'airgunlab'.
'airgunlab' is an anagram of 'BULGARIAN'.
(Other definitions for bulgarian that I've seen before include "Native of Sofia" , "language" .)