I leave America to change photographic device (6)
I believe the answer is:
camera
'photographic device' is the definition.
(I've seen this before)
'i leave america to change' is the wordplay.
'leave' indicates named letters should be taken away.
'to change' indicates an anagram.
'america' with 'i' taken out is 'amerca'.
'amerca' is an anagram of 'CAMERA'.
(Other definitions for camera that I've seen before include "Photographic device" , "Common recording device for pictures" , "Still producer" , "In - means in private" , "Photo taker" .)