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crux of the biscuit (bumble_bee); the cherry on the cake (the final thing that makes something perfect: The fabulous weather on the day was the cherry on the cake.  macmillandictionary.com Logofreak) | |||
| the final flourish (Alexey Lebedev); cherry on top (maystay); takes the cake (April May) | |||
| icing on the cake (Alexey Lebedev); cherry on top of the cake (Alex Lilo) | |||