Showing street actors in endless spree (12)
I believe the answer is:
broadcasting
'showing' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'street actors in endless spree' is the wordplay.
'street' becomes 'road' (I've seen this before).
'actors' becomes 'cast' (I've seen this before).
'in' indicates putting letters inside.
'endless spree' becomes 'bing' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'road'+'cast'='roadcast'
'roadcast' inserted inside 'bing' is 'BROADCASTING'.
Can you help me to learn more?
(Other definitions for broadcasting that I've seen before include "on air" , "TV transmission?" , "Transmitting radio/TV" .)