Rabbit on the breakfast menu? (6)
I believe the answer is:
waffle
I believe this clue is a double definition.
'rabbit' is the first definition.
(I've seen this before)
'on the breakfast menu?' is the second definition.
(a waffle might appear on a breakfast menu)
(Other definitions for waffle that I've seen before include "blather" , "Wordy talk or a small cake eaten hot" , "Vague wordy talk or small cake." , "Cake; speak vaguely" , "Type of pancake and uninteresting talk" .)