Dish consumed by raucous cousins (8)
I believe the answer is:
couscous
'dish' is the definition.
(I've seen this before)
'consumed by raucous cousins' is the wordplay.
'consumed by' says the answer is hidden in the clue (inserted letters get consumed).
'COUSCOUS' can be found hidden inside 'raucous cousins'.
(Other definitions for couscous that I've seen before include "Wheat grain (N. Afr.)" , "African dish of crushed steamed semolina" , "North African dish of crushed durum wheat" , "Kind of African semolina" , "Semolina grains" .)