Yankee drone crashed over there (6)
I believe the answer is:
yonder
'over there' is the definition.
(archaic preposition meaning 'over there')
'yankee drone crashed' is the wordplay.
'yankee' becomes 'Y' (phonetic alphabet: alpha, bravo, charlie etc.).
'crashed' indicates anagramming the letters.
'drone' anagrammed gives 'onder'.
'y'+'onder'='YONDER'
(Other definitions for yonder that I've seen before include "At a distance but in sight" , "Over there, a long time ago" , "to place indicated" , "Over there (poetic)" , "Over there, of old." .)