Cast North as ideal place (6)
I believe the answer is:
heaven
'ideal place' is the definition.
(I've seen this before)
'cast north' is the wordplay.
'cast' becomes 'heave' (heaving is a kind of casting).
'north' becomes 'N' (abbreviation).
'heave'+'n'='HEAVEN'
'as' is the link.
(Other definitions for heaven that I've seen before include "ecstasy" , "Elysium, Nirvana" , "Ideal place" , "Nirvana, paradise" , "Happy place" .)