Tropical jelly source (5)
I believe the answer is:
guava
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tropical jelly source</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 guava that I've seen before include "Large cask; tube" , "South American fruit" , "Yellow-skinned tropical fruit" , "Tropical shrub bearing small yellowish fruit" , "Pear-shaped tropical fruit" .)