Where you can happily walk when broadcasting (2,3)
I believe the answer is:
on air
'broadcasting' is the definition.
(broadcasting on the air)
'where you can happily walk when' is the wordplay.
I cannot quite see how this works, but
'when' could be 'on' (I've seen this in other clues) and 'on' is found in the answer.
The remaining letters 'air' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for on air that I've seen before include "Cushioned" , "(Walking) elatedly" , "put out" , "with audience?" , "very happily?" .)