Crossword Genius

What cream may do in the process of shaving? (6)

Ross

I believe the answer is:

vanish

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'process of shaving?' is the definition.
The answer and definition can be both related to change as well as being verbs in their base form.
Perhaps you can see a link between them that I don't see?

I cannot understand how the remainder of the clue works.

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(Other definitions for vanish that I've seen before include "Disappear or fade from sight" , "make go" , "Evanesce" , "Become invisible" , "Disappear without trace" .)

I've seen this clue in the Evening Standard.
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