Irish national emblem (8)
I believe the answer is:
shamrock
'irish national emblem' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for shamrock that I've seen before include "Native Irish trefoil" , "Irish national emblem" , "The national Irish trefoil" , "Symbol of Ireland" , "Sign of first part of 10 [IRISH [SEA]]" .)