Set of rooms (5)
I believe the answer is:
suite
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">set of rooms</span>' is the definition.<br/ ><span class="explanation-format__explanation">(eg a hotel suite)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for suite that I've seen before include "Adjoining rooms" , "Musical composition" , "Retinue; apartment" , "Train; set of rooms" , "Compensate for (faults)" .)