Garden bug (5)
I believe the answer is:
aphid
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">garden bug</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 aphid that I've seen before include "Horticultural pest" , "Sap-sucking bug" , "one living on juices" , "Small plant-sucking insect" , "Fly" .)