2.5mg twice a day is an excellent starting Anavar dosage for you. You can probably increase to 5mg twice a day within a couple weeks if you're not experiencing any serious virilization.
Clen and var makes a good cutting cycle, you might lose a little muscle, but the var will help you with the anti-catabolism. Also, a good general guideline for clen is 2 weeks on/2 weeks off to let your b2 receptors clear out. Here's a sample 6-week cycle for both:
Week 1: 5mg Anavar daily; 10mcg clenbuterol, increasing up to 20-30mcg
Week 2: 5mg Anavar daily; 20-30mcg clenbuterol, taper down to 10mcg
Week 3: 10mg Anavar
Week 4: 10mg Anavar
Week 5: 15mg Anavar (if little/no virilization); 20mcg clenbuterol, increasing to 30-40mcg
Week 6: 15mg Anavar; 30-40mcg clenbuterol, taper down to 20mcg