Crossword Genius

Kind of family with funny uncle caught abandoning car (7)

Ross

I believe the answer is:

nuclear

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'kind' is the definition.
(I have seen 'kind of war' mean 'nuclear' so perhaps 'kind' could also mean 'nuclear')

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for nuclear that I've seen before include "power source" , "These weapons release atomic energy" , "type of power supply" , "Relating to atomic structure" , "Using fission or fusion" .)

I've seen this clue in The Guardian.
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