Retirement home where things are unclear? (4,4)

I believe the answer is:

grey area

'where things are unclear?' is the definition.

I don't understand how the remainder of the clue works.

(Other definitions for grey area that I've seen before include "Unclear state of affairs" , "Ill-defined zone" , "where work is inadequate" , "Ill-defined region" , "something hard to define" .)

I've seen this clue in The Guardian.

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