Arab cried out for barrier (9)
I believe the answer is:
barricade
'for barrier' is the definition.
(barricade is a kind of barrier)
'arab cried out' is the wordplay.
'out' indicates an anagram (out can mean wrong or inaccurate).
'arab'+'cried'='arabcried'
'arabcried' with letters rearranged gives 'BARRICADE'.
(Other definitions for barricade that I've seen before include "Obstacle" , "Temporary blockage to obstruct movement" , "Fortification, barrier" , "Defensive structure, maybe improvised" , "Erected defence" .)