First see son of Noah with sweet Irish emblem (8)
I believe the answer is:
shamrock
'irish emblem' is the definition.
(I've seen this before)
'first see son of noah with sweet' is the wordplay.
'first' says to take the initial letters.
'son of noah' becomes 'ham' (I've seen this before).
'with' is a charade indicator (letters next to each other).
'sweet' becomes 'rock' (rock is a kind of sweet**).
The first letter of 'see' is 's'.
's'+'ham'+'rock'='SHAMROCK'
(Other definitions for shamrock that I've seen before include "Symbol of Ireland" , "symbolic of Ireland" , "Mash cork into the emblem" , "Irish national symbol" , "The national Irish trefoil" .)