Attractive perch on top of the world (8,4)
I believe the answer is:
'top of the world' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'attractive perch on' is the wordplay.
'attractive' becomes 'magnetic' (synonyms).
'perch' becomes 'pole' (synonyms).
'on' says to put letters next to each other.
Can you help me to learn more?
(Other definitions for magnetic pole that I've seen before include "a point far from home" , "Compass points to it" .)