Negative mindset fades out with time (9)

I believe the answer is:

defeatism

I'm a little stuck... Click here to teach me more about this clue!

'negative mindset' is the definition.
I can't tell whether this defines the answer.

'fades out with time' is the wordplay.
'out with' indicates an anagram (out can mean wrong or inaccurate).
'fades' mixed up with 'time' makes 'DEFEATISM'.

Can you help me to learn more?

(Other definitions for defeatism that I've seen before include "hopeless attitude" , "Overeagerness to admit to failure" .)

I've seen this clue in The Times.

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