Rabbit food regularly impressed (6)
I believe the answer is:
waffle
This clue is a double definition.
'rabbit' is the first definition.
(I've seen this before)
'food regularly impressed' is the second definition.
(food item with indentations or impressions)
(Other definitions for waffle that I've seen before include "Vacillating talk" , "Crisp pancake with indents on both sides - talk aimlessly" , "Lengthy vague talk" , "Go on and on (talking)" , "blather" .)