Useful facility (7)

I believe the answer is:
amenity
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">useful facility</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 amenity that I've seen before include "Pleasantness" , "Facility serving the public" , "Pleasing facility" , "Feature that makes life pleasant or convenient" , "Facility, useful feature" .)