Runs an old instrument, one making pasta (7)
I believe the answer is:
ravioli
'pasta' is the definition.
(I know that ravioli is a type of pasta)
'runs an old instrument one' is the wordplay.
'runs' becomes 'r' (cricket abbreviation).
'an' becomes 'a'.
'old instrument' becomes 'viol' (historical stringed instrument).
'one' becomes 'i' (Roman numeral).
'r'+'a'+'viol'+'i'='RAVIOLI'
'making' is the link.
(Other definitions for ravioli that I've seen before include "(Meat, cheese, etc filled) pasta cases" , "Small pasta cases with savoury fillings" , "Filled envelopes of course" , "you might have at La Scala?" , "Italian food" .)