Moped, maybe, having limited power (7)
I believe the answer is:
scooter
'moped' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for scooter that I've seen before include "Motorised bike" , "Vehicle and child's toy" , "To score (anag)" , "it may need physical boost" , "Moveable toy" .)