Optical device arrived, to be given to artist (6)
I believe the answer is:
camera
'optical device' is the definition.
(a camera is a type of optical device)
'arrived to be given to artist' is the wordplay.
'arrived' becomes 'came' (coming is a kind of arriving).
'to be given to' means one lot of letters go next to another.
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'came'+'ra'='CAMERA'
(Other definitions for camera that I've seen before include "Brownie possibly" , "Photographic device" , "Brownie maybe" , "private chamber" , "Nullify" .)