Middle Eastern serial broadcast before one (7)
I believe the answer is:
israeli
'middle eastern' is the definition.
(I've seen this before)
'serial broadcast before one' is the wordplay.
'broadcast' indicates an anagram.
'before' means one lot of letters go next to another.
'one' becomes 'i' (Roman numeral**).
'serial' anagrammed gives 'israel'.
'israel'+'i'='ISRAELI'
(Other definitions for israeli that I've seen before include "From Jerusalem, perhaps" , "of the Levant?" , "Citizen of a Middle Eastern nation" , "Haifa native" , "From Jaffa, perhaps?" .)