Opening a University? It’s more than a piece of cake (6)
I believe the answer is:
gateau
'it's more than a piece of cake' is the definition.
(a gateau is a whole cake)
'opening a university?' is the wordplay.
'opening' becomes 'gate' (I have seen 'Movable opening ' mean 'gate' so perhaps 'opening' could also mean 'gate').
'university?' becomes 'u'.
'gate'+'a'+'u'='GATEAU'
(Other definitions for gateau that I've seen before include "Calorie-laden cake" , "Elaborate cake" , "Rich dessert cake" , "Gooey cake" , "Fancy cake" .)