Arrived with artist, a photographer (6)
I believe the answer is:
camera
'a photographer' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'arrived with artist' is the wordplay.
'arrived' becomes 'came' (come can mean to appear or arrive).
'with' is a charade indicator (letters next to each other).
'artist' becomes 'RA' (Royal Academician, member of Royal Academy of Arts).
'came'+'ra'='CAMERA'
Can you help me to learn more?
(Other definitions for camera that I've seen before include "Snapper?" , "Picture-taker" , "In which people privately discuss" , "In - means in private" , "Device for taking photos" .)