Material broadcast in disputed region (7)
I believe the answer is:
Here is my best explanation:
'disputed region' is the definition.
'material broadcast' is the wordplay.
I cannot quite see how this works, but
'material' could be 'ash' (ash is a kind of material) and 'ash' is located in the answer.
This explanation may well be incorrect...
'in' is the link.
(Other definitions for kashmir that I've seen before include "Himalayan region", "State", "Region claimed by both India and Pakistan", "disputed Asian region", "Subcontinental border region", "Himalayan territory", "Territory disputed between India and Pakistan since 1947", "disputed region of Asia", "Region on the border of India and Pakistan" and "disputed area".)