Being filmed by operational recording device (2,6)
I believe the answer is:
on camera
'being filmed' is the definition.
(I've seen this before)
'operational recording device' is the wordplay.
I cannot quite understand how this works, but
'device' could be 'camera' (I have seen 'Photographic device' mean 'camera' so perhaps 'device' could also mean 'camera') and 'camera' is located in the answer.
The remaining letters 'on' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'by' is the link.
Can you help me to learn more?
(Other definitions for on camera that I've seen before include "In process of being filmed" , "Being shot" .)