Her sad confusion isn't hers alone (6)

I believe the answer is:

shared

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'isn't hers alone' is the definition.
I can't tell whether this defines the answer.

'her sad confusion' is the wordplay.
'confusion' indicates an anagram.
'her'+'sad'='hersad'
'hersad' anagrammed gives 'SHARED'.

Can you help me to learn more?

(Other definitions for shared that I've seen before include "Possessed in common" , "Used by more than one" , "Participated in" , "Jointly possessed" , "Meted out, allotted portions" .)

I've seen this clue in The Globe and Mail.

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