Question (clone) asset is only come out at play mode, it have no prefab or anything

HI, thanks to read this.

i have download some project asset, i have find some fine asset.
i check this asset(object,material,texture,shader).i want applicated this to my project
but it come out to 'clone' asset at only in play mode, no have sorce of prefabs or asset(obj,mat,shader)
how to extract 'clone' asset to out of playmode? or how to find sorce asset?

i guess this problem is may be connected to prefab, and i ask questions for this in prefab community.
if you think more proper community for this problem , recommend to me i will try.

Thanks to read!