Was it the larger or smaller Clown that died?
Clownfish are Damsels and can usually hold their own unless the other Damsel was larger.
First item of business would be to positively identify your Clownfish. Most Ocellaris are sold as Percula so you need to ID it seperate from the name it was purchased under.
Although Percula and Ocellaris often bond, you'll have better odds if both Clownfish are of the same species.