yes, once (if) it reverts back to a normal leaf pattern, then you can clone from it. Did you leave any budsites at all? The new growth comes directly from the buds from what I have seen. If you only left a few fans then you may not have enough plant matter (?)

If I am going to reveg I generally leave the bottom ~ 15-20% of the plant intact, cut the roots back, repot and put under 24 hrs light, feeding 1/2 str grow food. Ive had a reveg take 10 days to show growth, and one take 30 days to show growth.