Access a posh cake (6)

I believe the answer is:

gateau

'cake' is the definition.
(gateau is a kind of cake)

'access a posh' is the wordplay.
'access' becomes 'gate' (I've seen this in other clues).
'posh' becomes 'u' (abbreviation for upper-class - opposite to non-U).
'gate'+'a'+'u'='GATEAU'

(Other definitions for gateau that I've seen before include "Cake for Pierre" , "Afternoon snack" , "named for Black Forest?" , "Cream dessert cake" , "Black Forest dessert" .)

I've seen this clue in The Sun.

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