This is the 4968th most frequent Spanish word.
elaborada
Elaborada: Elaborated or crafted with care.
Here, 'elaborada' describes how the work (la obra) has been crafted meticulously.
La obra está elaborada con gran detalle.
The work is crafted with great detail.
In this sentence, 'elaborada' qualifies the explanation, meaning it is thorough and comprehensive.
Esta explicación es muy elaborada y clara.
This explanation is very elaborate and clear.
'Elaborado', in a masculine form due to 'pastel', indicates that the cake was created or prepared by someone.