Motorised bicycle (5)
I believe the answer is:
moped
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">motorised bicycle</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 moped that I've seen before include "Power-assisted vehicle" , "Was in low spirits about the low-powered motorbike" , "dejected" , "Mooned around" , "Languidly moved" .)