Pretend to be in front? How could you! (3,5)

I believe the answer is:

for shame

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'could you' is the definition.
I know nothing about this answer so I can't tell whether this works.

'pretend to be in front?' is the wordplay.
'pretend' becomes 'sham' (synonyms).
'to be in' means one lot of letters goes inside another.
'front?' becomes 'fore' (fore is a kind of front).
'sham' placed inside 'fore' is 'FOR SHAME'.

'how' is the link.

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I've seen this clue in the Evening Standard.

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