Indefinite or unknown location (9)
I believe the answer is:
somewhere
'indefinite or unknown location' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for somewhere that I've seen before include "In an unspecified place" , "uncertain regarding place" , "Indefinite or unknown location" , "'. . . . . . . . . Over the Rainbow' (song)" , "in unspecified location" .)