Uninterested in big news for the Spencers in 1981 (10)

I believe the answer is:

disengaged

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'uninterested' is the definition.
The answer and definition are not the same part of speech. However, adjectives and past participle verbs can sometimes define each other.

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(Other definitions for disengaged that I've seen before include "Unattached" , "withdrawn" , "Detached, separated" .)

I've seen this clue in The Guardian.

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