Restaurant patron (5)
I believe the answer is:
diner
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">restaurant patron</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for diner that I've seen before include "One eating a meal" , "Small US restaurant" , "Railway carriage serving meals" , "Buffet car" , "Restaurant customer" .)