Broadcast second number on old record next (6)
I believe the answer is:
beside
'next' is the definition.
Both the answer and definition are adverbs.
Perhaps you can see a link between them that I don't see?
'broadcast second number on old record' is the wordplay.
'broadcast' shows a homophone (sound like) (how the word might sound on the radio or TV).
'second' becomes 'b' (B can mean second eg B-side).
'number on old record' becomes 'side' (I am not sure about this - if you are sure you should believe this answer much more).
'b' is a homophone of 'be'.
'be'+'side'='BESIDE'
Can you help me to learn more?
(Other definitions for beside that I've seen before include "Adjacent to" , "Next to - compared with" , "Very near to" , "- - the point" , "Next door to" .)