Some tutor moving farthest away (9)

I believe the answer is:

outermost

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'farthest away' is the definition.
I can't tell whether this defines the answer.

'some tutor moving' is the wordplay.
'moving' indicates an anagram (letters are moved around).
'some'+'tutor'='sometutor'
'sometutor' is an anagram of 'OUTERMOST'.

Can you help me to learn more?

(Another definition for outermost that I've seen is " farthest from centre".)

I've seen this clue in The Guardian.

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