Custard-filled pastries (7)
I believe the answer is:
eclairs
'custard-filled pastries' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for eclairs that I've seen before include "Oblong pastries" , "in which la creme may be found?" , "Oblong cream puffs" , "Cream cakes" , "Choux pastries with cream and chocolate icing" .)