Far-off meteor exploded (6)
I believe the answer is:
remote
'far-off' is the definition.
(I've seen this before)
'meteor exploded' is the wordplay.
'exploded' is an anagram indicator.
'meteor' with letters rearranged gives 'REMOTE'.
(Other definitions for remote that I've seen before include "Slight possibility" , "Distant like meteor (6)" , "gadget" , "Far away in time or place" , "Distant, far away" .)