On top of (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">on top of</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 upon that I've seen before include "On tope of" , "At a prescribed point in time" , "Straddling" , "Onto" , "Au courant" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">on top of</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for above that I've seen before include "Aforementioned" , "At a higher level" , "Given earlier (in text)" , "Mentioned earlier" , "Superior to" .)