Violence for broadcast about European metropolis (8)
I believe the answer is:
ferocity
'violence' is the definition.
(I know that violence can be written as ferocity)
'for broadcast about european metropolis' is the wordplay.
'broadcast' indicates an anagram (letters scattered or cast around).
'about' indicates putting letters inside.
'european' becomes 'E' (abbreviation e.g. EU).
'metropolis' becomes 'city' (a metropolis is a large city).
'for' is an anagram of 'fro'.
'fro' going around 'e' is 'fero'.
'fero'+'city'='FEROCITY'
(Other definitions for ferocity that I've seen before include "Savagery, fierceness" , "Savageness" , "Cruel violence" , "Savage cruelty of temperament" , "Wild savagery" .)