Wise man going round America with food item (7)
I believe the answer is:
sausage
'food item' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'wise man going round america' is the wordplay.
'wise man' becomes 'sage' (sage is a kind of wise man).
'going round' indicates putting letters inside (some letters go around others).
'america' becomes 'usa' (United States of America).
'sage' enclosing 'usa' is 'SAUSAGE'.
'with' acts as a link.
Can you help me to learn more?
(Other definitions for sausage that I've seen before include "Chipolata, for example" , "E.g. salami, bratwurst" , "Tube-shaped food item" , "Banger; snag" , "sort of roll?" .)