Superabundance of the polar variety (8)
I believe the answer is:
plethora
'superabundance' is the definition.
(I've seen this before)
'the polar variety' is the wordplay.
'variety' indicates anagramming the letters.
'the'+'polar'='thepolar'
'thepolar' anagrammed gives 'PLETHORA'.
'of' acts as a link.
(Other definitions for plethora that I've seen before include "Over-fullness, excess" , "Excess, glut" , "Large number" , "Excessively large amount" , "Cornucopia -- superfluity" .)