Colloquial saying (5)
I believe the answer is:
idiom
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">colloquial saying</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for idiom that I've seen before include "Dialect, vernacular" , "Phrase with a meaning that is not literal" , "Linguistic peculiarity" , "Characteristic style of expression" , "Group of words in which the meaning may not be obvious" .)