How can it be a clone only strain....????
Lots of popular medical strains are "clone only". By definition, no ceeds are available for "clone only" lines.
In most cases the "clone only" lines represent either rare phenotypes of commercial lines, or specific unique hybrids that (for reasons I won't get into) can't be reproduced.
In practice, what this means is that the only way to get an exact genetic copy is to clone it (take a cutting).
You can't cross a sour diesel with a male one to make ceeds. . .because there is no male and never has been!
Because the plant is a hybrid and not a true-breeding line if you were to force a sour diesel to create male flowers (using chemicals) and then fertilized a female with the pollen, contrary to popular belief, you would NOT end up with a genetic copy of the same plant. Instead, you'd end up with a number of plants with different phenotypes. SOME of these might be similar to the original mother plant, but some would not be. How different the phenos would be depends on how hybridized the clone only parent is.
In practice, what you can do is try a cross like this, or find some individuals that are similar to the original, then cross them to create something similar to the parent. You may do some selection and backcrossing to help stablize the line a bit and limit phenos. What you end up with won't be exactly the same as the original, but it well may be close enough that any difference isn't important, and good enough for anyone interested in the line to have something in ceed form.
The CC sour diesel "ceeds" are supposed to be something like this. Two SD lineage plants were crossed to create something in ceed form that approximates the clone-only sour diesel line.