Depressed broadcaster's wretched and precipitate descent (8)
I believe the answer is:
downpour
'precipitate descent' is the definition.
'downpour' can be an answer for 'descent' (thesaurus). I am unsure of the 'precipitate' bit.
'depressed broadcaster's wretched' is the wordplay.
'depressed' becomes 'down' ('down' can be a synonym of 'depressed').
'broadcaster's wretched' becomes 'pour' (I can't explain this - if you can you should believe this answer much more).
'down'+'pour'='DOWNPOUR'
'and' is the link.
Can you help me to learn more?
(Other definitions for downpour that I've seen before include "cats and dogs?" , "Torrent" , "Cloudburst" , "Heavy continuous rainfall" , "Deluge" .)