Valuable thing (5)
I believe the answer is:
asset
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">valuable thing</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for asset that I've seen before include "Beneficial thing" , "Something of value, worth having" , "Tessa (anag)" , "Anything considered valuable" , "Seats (anag.)" .)