De or het samenklontering?

The correct Dutch article is:

de samenklontering

Rule Words ending in -ing: almost always de. See the rule

How to use samenklontering

the samenklonteringde samenklontering
this samenklonteringdeze samenklontering
that samenklonteringdie samenklontering
our samenklonteringonze samenklontering
your samenklonteringjouw samenklontering
every samenklonteringelke samenklontering
which samenklontering?welke samenklontering?
a big samenklontering / the big samenklonteringeen grote samenklontering, de grote samenklontering