Hide North Korean leader's fiscal irregularity (8)
I believe the answer is:
calfskin
'hide' is the definition.
(thesaurus)
'north korean leader's fiscal irregularity' is the wordplay.
'leader' indicates taking the first letters.
'irregularity' indicates anagramming the letters.
The initial letters of 'north korean' is 'nk'.
'nk'+'fiscal'='nkfiscal'
'nkfiscal' with letters rearranged gives 'CALFSKIN'.
(Other definitions for calfskin that I've seen before include "Fine, soft kind of leather" , "Type of leather" , "Leather (off young cow)" .)