I can roam about for pasta (8)
I believe the answer is:
macaroni
'for pasta' is the definition.
(macaroni is a kind of pasta)
'i can roam about' is the wordplay.
'about' indicates anagramming the letters.
'i'+'can'+'roam'='icanroam'
'icanroam' is an anagram of 'MACARONI'.
(Other definitions for macaroni that I've seen before include "Italian fare" , "Hollow pasta" , "Slender tubes of pasta" , "Thin tubes of pasta" , "Omani car (anag)" .)