Start to care about lack of prejudice (4,4)

I believe the answer is:

open mind

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'lack of prejudice' is the definition.
I know nothing about this answer so I can't judge whether this works.

'start to care' is the wordplay.
'start' becomes 'open' (opening is a kind of starting).
'to care' becomes 'mind' (I've seen this in another clue).
'open'+'mind'='OPEN MIND'

'about' is the link.

Can you help me to learn more?

(Another definition for open mind that I've seen is " Keep an .... .... so as not to be prejudiced".)

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