The polar disruption in abundance (8)
I believe the answer is:
plethora
'abundance' is the definition.
(I've seen this before)
'the polar disruption' is the wordplay.
'disruption' indicates an anagram.
'the'+'polar'='thepolar'
'thepolar' with letters rearranged gives 'PLETHORA'.
'in' acts as a link.
(Other definitions for plethora that I've seen before include "'Large, perhaps excessive, amount (8)'" , "Profusion" , "almost too much" , "Cornucopia -- superfluity" , "More than enough" .)