Silence on the radio or the funeral march? (4,3)
I believe the answer is:
dead air
'the funeral march?' is the definition.
I don't know anything about this answer so I cannot judge whether this works.
'silence on the radio' is the wordplay.
'silence on' becomes 'dead' (I am not sure about this - if you are sure you should believe this answer much more).
'the radio' becomes 'air' (I've seen this before).
'dead'+'air'='DEAD AIR'
'or' acts as a link.
Can you help me to learn more?
(Another definition for dead air that I've seen is " Silence on radio".)