Without a plan to lose home, becoming derelict (8)

I believe the answer is:

untended

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'derelict' is the definition.
Both the answer and definition are adjectives. Perhaps there's a link between them I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for untended that I've seen before include "Neglected" , "Not looked after" , "Left without attention or minder" , "Not properly cared for" .)

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

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