Posh menu strangely unsophisticated (8)
I believe the answer is:
homespun
'unsophisticated' is the definition.
(thesaurus)
'posh menu strangely' is the wordplay.
'strangely' indicates anagramming the letters.
'posh'+'menu'='poshmenu'
'poshmenu' anagrammed gives 'HOMESPUN'.
(Other definitions for homespun that I've seen before include "Folksy - open mush (anag)" , "Unsophisticated; a coarse fabric" , "Artless - posh menu (anag)" , "Simple, unsophisticated" , "Unsophisticated -- posh menu (anag)" .)