Dutch territory in the sea's holding back desire to create children's paradise (10)
I believe the answer is:
disneyland
'the sea's holding back desire to create children's paradise' is the definition.
I can't tell whether this definition defines the answer.
'dutch territory' is the wordplay.
'dutch' becomes 'disney' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'territory' becomes 'land' (land is a kind of territory).
'disney'+'land'='DISNEYLAND'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for disneyland that I've seen before include "it could be amusing!" , "theme park" .)