Fancy pure evil's root is money (5)
I believe the answer is:
rupee
'is money' is the definition.
(currency of India)
'fancy pure evil's root' is the wordplay.
'fancy' indicates an anagram.
'root' suggests taking the first letters (I've seen 'root of' mean this).
The initial letter of 'evils' is 'e'.
'pure' is an anagram of 'rupe'.
'rupe'+'e'='RUPEE'
(Other definitions for rupee that I've seen before include "little money abroad" , "cash" , "Lots of pies" , "low cost in Pakistan?" , "Indian bread" .)