European ignoring leader, creating stink (4)
I believe the answer is:
reek
'stink' is the definition.
(I know that reek is a type of stink)
'european ignoring leader' is the wordplay.
'european' becomes 'greek' (Greece is in Europe).
'ignoring leader' means to remove the first letter.
'greek' with its initial letter removed is 'REEK'.
'creating' is the link.
(Other definitions for reek that I've seen before include "Effluvium" , "Fume" , "Smell offensively" , "Strong smell" , "'Stink, stench (4)'" .)