Town-crier's call (4)
I believe the answer is:
oyez
'town-crier's call' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for oyez that I've seen before include "Call of the olde Town Crier" , "Call of the English town crier" , "Town crier's shout" , "Town crier's 'Attention!'" , "Call of hte old Town Crier" .)