Transmission time chosen to accommodate constraints of audiences (8)
I believe the answer is:
telecast
'transmission' is the definition.
(a telecast is a TV transmission)
'time chosen to accommodate constraints of audiences' is the wordplay.
'time' becomes 't' (abbreviation).
'chosen' becomes 'elect' ('elect' as an adjective can mean chosen).
'to accommodate' is an insertion indicator.
'constraints of audiences' becomes 'as' (I can't explain this - if you can you should give a lot more credence to this answer).
'elect' enclosing 'as' is 'elecast'.
't'+'elecast'='TELECAST'
Can you help me to learn more?
(Other definitions for telecast that I've seen before include "TV broadcast" , "TV show" , "TV programme?" , "TV transmission" .)