Common phrase (5)
I believe the answer is:
idiom
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">common phrase</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for idiom that I've seen before include "Language peculiar to a particular group" , "Form or variety of language" , "particular phrase" , "Language used by people or group, vernacular" , "Dialect, vernacular" .)