Refusal in Paris hearing? Balderdash! (8)
I believe the answer is:
nonsense
'balderdash' is the definition.
(I've seen this before)
'refusal in paris hearing?' is the wordplay.
'refusal in paris' becomes 'non' ('no' in French).
'hearing?' becomes 'sense' (hearing is a kind of sense).
'non'+'sense'='NONSENSE'
(Other definitions for nonsense that I've seen before include "double Dutch?" , "silly ideas" , "Bunk" , "Foolish behaviour" , "Gibberish" .)