Love apple (6)
I believe the answer is:
tomato
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">love apple</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that love apple can be written as tomato)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tomato that I've seen before include "It used to be call a love-apple" , "Part of a BLT sandwich" , "Salad plant" , "A motto turned out to be fruit/veg" , "A glossy red fruit eaten as a vegetable" .)