De or het clowntje?

The correct Dutch article is:

het clowntje

Rule Diminutives (-je, -tje, -pje): always het. See the rule

This word is not in the word lists we use to double-check answers.

How to use clowntje

the clowntjehet clowntje
this clowntjedit clowntje
that clowntjedat clowntje
our clowntjeons clowntje
your clowntjejouw clowntje
every clowntjeelk clowntje
which clowntje?welk clowntje?
a big clowntje / the big clowntjeeen groot clowntje, het grote clowntje