Possibly another one in party, broadcasting (2,3,5)

I believe the answer is:

on the radio

'broadcasting' is the definition.
(broadcasting on the radio)

'possibly another one in party' is the wordplay.
'possibly' indicates anagramming the letters.
'one' becomes 'i' (Roman numeral).
'in' indicates putting letters inside.
'party' becomes 'do' (do is a kind of party).
'i' going into 'do' is 'dio'.
'another' anagrammed gives 'onthera'.
'onthera'+'dio'='ON THE RADIO'

I've seen this clue in The Guardian.

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