People, places and things (5)
I believe the answer is:
nouns
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">people places and things</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 nouns that I've seen before include "Parts of speech" , "Words referring to person, place or thing" , "Words of particular type" , "Identifying words" , "Words used as names of person, place or thing" .)