Places of work (7)
I believe the answer is:
offices
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">places of work</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 offices that I've seen before include "Places of business" , "Places of work" , "Government departments - where they sell tickets" , "business premises" , "posts" .)