Loony left sees me shifting my personal values (4-6)

I believe the answer is:

self-esteem

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'shifting my personal values' is the definition.
I can't judge whether this definition defines the answer.

'loony left sees me' is the wordplay.
'loony' indicates anagramming the letters.
'left'+'sees'+'me'='leftseesme'
'leftseesme' anagrammed gives 'SELF-ESTEEM'.

Can you help me to learn more?

(Another definition for self-esteem that I've seen is " Confidence in one's own abilities and worth".)

I've seen this clue in The Guardian.

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