It's on the plus side (5)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">it's on the plus side</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for asset that I've seen before include "Something that's worth having" , "- - -stripper" , "Plus point" , "Valuable person" , "Item of property" .)