Pronouncedly the sweet of the week? (6)

I believe the answer is:

sundae

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'sweet of the week?' is the definition.
'sundae' can be an answer for 'sweet' (sundae is a kind of sweet). I am not sure about the 'of the week?' bit.

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for sundae that I've seen before include "Ice-cream/nut etc. dish" , "'Ice cream topped with fruit, nuts and syrup (6)'" , "Dish of ice-cream, fruit etc - sounds Sabbatical" , "Rich ice cream dish" , "A lush ice-cream - sounds Sabbatical" .)

I've seen this clue in the Evening Standard.

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