Partly obliterated, but not in the dark (3)
I believe the answer is:
lit
'not in the dark' is the definition.
(I've seen this in another clue)
'partly obliterated but' is the wordplay.
'partly' indicates the answer is hidden within the clue (part of the clue is used).
'LIT' can be found hidden inside 'obliterated but'.
(Other definitions for lit that I've seen before include "fine writing in condensed form" , "Fired" , "Set fire to" , "Set afire" , "Burning" .)