Something to eat at home following foul up (6)
I believe the answer is:
muffin
'something to eat' is the definition.
(muffin is a kind of food)
'home following foul up' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'following' says to put letters next to each other.
'foul up' becomes 'muff' ('muff' can be a synonym of 'foul up').
'in' after 'muff' is 'MUFFIN'.
'at' acts as a link.
(Other definitions for muffin that I've seen before include "Round raised cake, often split and toasted" , "Thick roll, usually toasted" , "Yeast cake eaten hot" , "Round bread-like cake" , "Flat, circular bread roll, eaten toasted and buttered" .)