Crossword Genius

Light bike moved aimlessly (5)

Ross

I believe the answer is:

moped

I'm a little stuck... Click here to teach me more about this clue!

This clue could be a double definition.

'light bike' is the first definition.
'moped' can be an answer for 'bike' (I've seen this before). I am not sure about the 'light' bit.

'moved aimlessly' is the second definition.
(I've seen this before)

Can you help me to learn more?

(Other definitions for moped that I've seen before include "Power-assisted vehicle" , "Motorised bicycle" , "Was in low spirits about the low-powered motorbike" , "Two-wheeled vehicle" , "Two-wheeled transport -- was in low spirits" .)

I've seen this clue in The Everyman puzzle in The Observer.
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