Fish tart cooked first, making a noise (8)
I believe the answer is:
rattling
'a noise' is the definition.
(I know that rattling is a type of noise)
'fish tart cooked first' is the wordplay.
'fish' becomes 'ling' (ling is a kind of fish).
'cooked' indicates anagramming the letters (letters cooked into a new form).
'first' says to put letters next to each other.
'tart' is an anagram of 'ratt'.
'ling' after 'ratt' is 'RATTLING'.
'making' acts as a link.
(Other definitions for rattling that I've seen before include "Quick and energetic" , "Travelling at great speed" , "Extraordinarily good, for a snake?" , "Making short hard sounds" , "Noisily shaking (as in good yarn)" .)