One way of saying artist entered secretly (2,6)
I believe the answer is:
in camera
'secretly' is the definition.
(I've seen this before)
'one way of saying artist entered' is the wordplay.
I cannot quite see how this works, but
'one' could be 'me' (a setter might use 'one' to humourously mean 'me') and 'me' is found in the answer.
'way' could be 'r' (abbreviation for right) and 'r' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for in camera that I've seen before include "Where film may be used" , "Where film would be kept" , "not shown to the public?" , "(Held) in private" , "'In private (2,6)'" .)