Need to have inventive parent? (9)

I believe the answer is:

necessity

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'need' is the definition.
(I know that necessity is a type of need)

I can't explain the remainder of the clue.

(Other definitions for necessity that I've seen before include "Requirement" , "Fundamental" , "It's said to be the mother of invention" , "Something essential or indispensable" , "Need, exigency" .)

I've seen this clue in The Times.

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