Granola relative (6)
I believe the answer is:
muesli
'granola relative' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for muesli that I've seen before include "Grain and dried fruit eaten with milk" , "Breakfast mush" , "Breakfast food of cereals, dried fruit, nuts etc" , "Breakfast food of cereal, fruits and nuts" , "Cereal made with oats and nuts" .)