Rice dish in foremost of restaurants — it's too exotic (7)
I believe the answer is:
risotto
'rice dish' is the definition.
(I've seen this before)
'foremost of restaurants it's too exotic' is the wordplay.
'foremost of' says to take the initial letters.
'exotic' is an anagram indicator.
The initial letter of 'restaurants' is 'r'.
'its'+'too'='itstoo'
'itstoo' anagrammed gives 'isotto'.
'r'+'isotto'='RISOTTO'
'in' acts as a link.
(Other definitions for risotto that I've seen before include "Italian food" , "Perhaps Italian" , "Italian recipe" , "F" , "food dish" .)