Worker’s vehicle is a small platform on four wheels (7)

I believe the answer is:

handcar

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'a small platform on four wheels' is the definition.
I can't tell whether this definition defines the answer.

'worker's vehicle' is the wordplay.
'worker' becomes 'hand' (hand is a kind of worker).
'vehicle' becomes 'car' (car is a kind of vehicle).
'hand'+'car'='HANDCAR'

'is' acts as a link.

Can you help me to learn more?

I've seen this clue in The Hindu.

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