Pasta, one gram included in revised ration (8)
I believe the answer is:
rigatoni
'pasta' is the definition.
(rigatoni is a kind of pasta)
'one gram included in revised ration' is the wordplay.
'one' becomes 'i' (Roman numeral).
'gram' becomes 'g' ('g' can be a synonym of 'gram').
'included in' is an insertion indicator.
'revised' is an anagram indicator.
'i'+'g'='ig'
'ration' is an anagram of 'ratoni'.
'ig' going within 'ratoni' is 'RIGATONI'.
(Other definitions for rigatoni that I've seen before include "Short fluted tubes of pasta" , "Short, ribbed, tubular pasta" , "Pasta - I got rain (anag)" , "Type of pasta" , "Form of pasta" .)