Asterix, say (4)
I believe the answer is:
gaul
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">asterix say</span>' is the definition.<br/ ><span class="explanation-format__explanation">(Asterix is a Gaul in a series of comic books)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for gaul that I've seen before include "Ancient area of western Europe" , "Roman France" , "Caesar's name for old France" , "old country" , "Name given for ancient France from Celtic times" .)