I have a throat infection. I don't have any amoxil (amoxicillin). Can I take clindamycin 150mg instead. Will it work for a throat infection?

Not a good idea. It's never a good idea to self prescribe any medication. The vast majority of throat infections are viral and antibiotics are of no use. Fever greater than 101, severe pain with swallowing, painful lymph nodes in the neck are signs of a bacterial infection requiring antibiotics and should be prescribed by a health care professional after examining you.