Pass round container for viewer (5)
I believe the answer is:
orbit
'pass round' is the definition.
'orbit' can be an answer for 'round' (I've seen this before). I am not sure about the 'pass' bit.
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for orbit that I've seen before include "Circumgyration" , "Area of influence - eye socket" , "Circuit of a planet" , "Path of a planet or satellite" , "Stellar path" .)