Workplace restaurant (7)
I believe the answer is:
canteen
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">workplace restaurant</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for canteen that I've seen before include "Workers' restaurant" , "somewhere to eat" , "eating-place?" , "Workplace restaurant" , "Works'' restaurant - cutlery" .)