One sat out after taking top from pot noodle? (5)
I believe the answer is:
pasta
'noodle?' is the definition.
(noodle is a kind of pasta)
'one sat out after taking top from pot' is the wordplay.
'one' becomes 'a' (a thing is one thing).
'out' indicates an anagram (out can mean wrong or inaccurate).
'after' means one lot of letters go next to another.
'taking top from' indicates taking the first letters.
The first letter of 'pot' is 'p'.
'sat' anagrammed gives 'sta'.
'a'+'sta'='asta'
'asta' put after 'p' is 'PASTA'.
(Other definitions for pasta that I've seen before include "Flour and water foodstuff" , "dish from Italy" , "Fusilli, penne etc" , "Spaghetti, ziti, fusilli, for example" , "Tagliatelle, for example" .)