Crossword Genius

Euphoric in the extreme north? (2,3,2,3,5)

Ross

I believe the answer is:

on top of the world

This clue is a double definition.

'euphoric' is the first definition.
(I've seen this in another clue)

'in the extreme north?' is the second definition.
(cryptic definition - the top of a world map)

(Other definitions for on top of the world that I've seen before include "as a polar bear, but not as a penguin?" , "Delighted" , "In seventh heaven" , "Elated" , "Penguins aren't" .)

I've seen this clue in The Telegraph.
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