Follower has left some food (4)
I believe the answer is:
flan
'food' is the definition.
(flan is a kind of food)
'follower has left some' is the wordplay.
'follower' becomes 'fan' (fan is a kind of follower).
'has' indicates putting letters inside.
'some' suggests taking the first letters.
The initial letter of 'left' is 'l'.
'fan' enclosing 'l' is 'FLAN'.
(Other definitions for flan that I've seen before include "Open pastry dish" , "Open pastry dessert" , "Baked and filled pastry case dish" , "pudding!" , "it may get jammed" .)