Top show almost missing its slot for broadcast (9)
I believe the answer is:
circulate
'broadcast' is the definition.
(synonyms)
'top show almost missing its slot' is the wordplay.
I cannot really understand how this works, but
'missing its slot' could be 'late' (something that arrives late has missed its slot) and 'late' is found within the answer.
This may be the basis of clue (or it may be nonsense).
'for' acts as a link.
Can you help me to learn more?
(Other definitions for circulate that I've seen before include "Make to go round, in a curve perhaps" , "Pass from person to person" , "Spread - rotate" , "Move around (at a party)" , "Pass around" .)