mos

[keggy]

35d mexican snack of a grilled tortilla with toppings
n?c?s i don't think it is tacos

42a a word for a part of something which is used to mean the whole thng
?e???y?

[razza]

Nacho
Metonym

[JoolsTwo]

42a meronym

[ladyalex]

42a Meronym ?

Why don't you think it is Tacos for 35d ?

[keggy]

on reflection i think meronym is the answer
meronym [Click for IPA pronunciation guide]. —n. a part of something used to refer to the whole, such as faces meaning people, as in they've seen a lot of ...
dictionary.reference.com/browse/meronym - Cached - Similar

[frank jury]

nacho ties in with 32a warrington and 39a races and 42a meronym

[keggy]

thank you all for your input it might well have have been metonym the meanings sound very similar

[steven79]

35d Nacho 42a Metonym