Not in view, but beyond compare (3,2,5)

I believe the answer is:

out of sight

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'beyond compare' is the definition.
Both the answer and definition are adverbs. Perhaps you can see a link between them that I can't see?

'not in view' is the wordplay.
'not in' becomes 'outof' (I can't justify this - if you can you should believe this answer much more).
'view' becomes 'sight' (synonyms).
'outof'+'sight'='OUT OF SIGHT'

'but' acts as a link.

Can you help me to learn more?

(Other definitions for out of sight that I've seen before include "secret" , "Top" , "Hidden" .)

I've seen this clue in the Sydney Morning Herald.

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