Replacement cardinal? (6)

I believe the answer is:

newman

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'replacement cardinal?' is the definition.
'newman' can be an answer for 'cardinal?' (I've seen this before). I am not sure about the 'replacement' bit.

'replacement cardinal?' is the wordplay.
'replacement' becomes 'new'.
'cardinal?' becomes 'man' (I can't explain this - if you can you should believe this answer much more).
'new'+'man'='NEWMAN'

Can you help me to learn more?

(Other definitions for newman that I've seen before include "Paul -, US actor" , "Cardinal - PC husband" , "John Henry --, beatified English theologian" , "John Henry --, beatified English cardinal" , "Cardinal -- Paul, actor" .)

I've seen this clue in the Evening Standard.

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