The phrase "a clump on" is correct and usable in written English.
It can be used to describe a mass or cluster of something that is located on a surface or area.
Example: "There was a clump on the ground that looked like it had been disturbed by an animal."
Alternatives: "a cluster on" or "a mass on".
"Conquering Solitude," for example, shows four figures — a man on one side and three boys in a clump on the other — almost immobilized by their environment.
This time it is the wild Norwegian lupin, standing proud in a clump on its own.
But since lower parts of the core are undamaged, the pellets may end up in various places around the reactor, not necessarily in a clump on the floor.
About 20 stalks thick and 12 feet tall, with leaves as long as a man's arm, the corn stands in a clump on the sidewalk.
For all measurements, the leaves were placed in in the chamber (LI-6400-08), using a clump-on leaf cuvette; the chamber was covered with transparent film at the top to ensure that ambient light of equal intensity reached the leaves.
An 18-month-old baby was found alive in a clump of trees on Pagai Selatan island on Wednesday, according to The A.P. Some survivors recalled the first moments of the tsunami.
The object of Sir Robert's wonder was the light from the Fastnet Lighthouse, completed just a month before on on a clump of jagged rock at the gateway to the Atlantic Ocean.
It was "The Holy Virgin Mary, Chris Ofilii's painting of a black Madonna with a clump of elephant manure on one breast and cutouts from pornographic magazines in the background.
For the uninitiated, Ofili's "The Holy Virgin Mary" depicts a black Virgin Mary with a clump of elephant dung on one breast and clippings of pornographic magazines in the background.
Following passage and continued differentiation, these pigmented clumps expanded and elongated over 150 days and were eventually joined by a clump of neural rosettes on one side of the pigmented structure.
If you find a "clump" of good berries on one stem, you can try cupping your hand around them, and rubbing them gently to loosen them, and make them fall off.
