Best substitute for shaving soap (5)

I believe the answer is:

cream

I'm a little stuck... Click here to teach me more about this clue!

This could be a double definition.

'best substitute for shaving' is the first definition.
'cream' can be an answer for 'best' (both can mean the elite). I am unsure of the 'substitute for shaving' bit.

'soap' is the second definition.
(thesaurus)

Can you help me to learn more?

(Other definitions for cream that I've seen before include "treat for cat?" , "It rises to the top, the best" , "Butterfat part of milk" , "An off-white shade" , "The best part -of the crop" .)

I've seen this clue in The Guardian and The Globe and Mail.

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