Dreary broadcast about tail of urban fox (7)
I believe the answer is:
reynard
'fox' is the definition.
(I've seen this before)
'dreary broadcast about tail of urban' is the wordplay.
'broadcast' indicates an anagram.
'about' is an insertion indicator.
'tail of' says to take the final letters.
The final letter of 'urban' is 'n'.
'dreary' with letters rearranged gives 'reyard'.
'reyard' enclosing 'n' is 'REYNARD'.
(Other definitions for reynard that I've seen before include "Crafty type" , "Traditional name for a fox" , "Archetypal name for a fox" , "Name for the fox in fable and folklore" , "Fox as trickster figure" .)