Would plain low fat yogurt with live & active culture be sufficient as probiotics needed to help with clindamycin. When best time to eat the yogurt.?

Yes and whenever. . Probiotics are a good idea whenever you're taking antibiotics, and worth continuing for a week or so afterwards. Yogurt is good, but a probiotic tablet of e coli or acidophilus may help a little more. It really doesn't matter what time of day you take the supplement.