Song - could be work by The Police or work of the B52s (3,4)
I believe the answer is:
air raid
'song' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'work by the police or work of the b52s' is the wordplay.
I cannot quite see how this works, but
'work' could be 'aid' (aid is a kind of work) and 'aid' is present in the answer.
This explanation may well be incorrect...
'could be' is the link.
Can you help me to learn more?
(Other definitions for air raid that I've seen before include "Attack from the sky" , "Attack by planes" , "Bombing attack" , "In wartime attack" , "Bombing mission" .)