Face-lift: what does it achieve? (9)

I believe the answer is:

elevation

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'it achieve?' is the definition.
The definition suggests a singular noun which matches the answer.

I cannot understand how the remainder of the clue works.

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(Other definitions for elevation that I've seen before include "Leave it on for altitude of a place" , "Height - a live note (anag)" , "High point" , "Grandeur" , "plan" .)

I've seen this clue in The Independent.

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