Where to put almonds on the cake? (5)

I believe the answer is:

genoa

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'the cake?' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

(Other definitions for genoa that I've seen before include "North Italian port" , "NW Italian sea port" , "Type of rich fruit cake" , "Italian city has no age, oddly" , "City of Italy" .)

I've seen this clue in the Evening Standard.

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