Loud clamour exploding near duchy (3,3,3)
I believe the answer is:
hue and cry
'loud clamour' is the definition.
(I've seen this before)
'exploding near duchy' is the wordplay.
'exploding' indicates anagramming the letters.
'near'+'duchy'='nearduchy'
'nearduchy' anagrammed gives 'HUE AND CRY'.
(Other definitions for hue and cry that I've seen before include "Public pursuit" , "Public outcry" , "Hullabaloo" , "furore" , "Loud public clamour" .)