Using last bit of petrol for power in Biden's car? (5)

I believe the answer is:

lotus

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'car?' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

(Other definitions for lotus that I've seen before include "Plant that mythically induces languor" , "Type of water lily" , "Water-lily; yoga position" , "Tropical water-lily" , "F1 team and car maker" .)

I've seen this clue in The Independent.

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