Last of yen, plenty for Japanese fare (7)
I believe the answer is:
noodles
'japanese fare' is the definition.
'last of yen plenty' is the wordplay.
'last of' indicates one should take the final letters.
'plenty' becomes 'oodles' (I've seen this before).
The last letter of 'yen' is 'n'.
'n'+'oodles'='NOODLES'
'for' is the link.
(Other definitions for noodles that I've seen before include "Simpletons (colloq.)" , "On instrument casually plays" , "Strips of pasta for soup" , "Egg pasta; simpletons" , "Oriental pasta" .)