You can wait for ever or do what I did and once the anemone is settled down, catch one clown, place him into a large clear glass (or other semi narrow container). Place the container back into the tank, closing the top of it with your hand and lower it towards the anemone. Once you are semi close, flip the container so the open end is pointed down, towards the anem, making sure the fish doesn't swim out too early.
Hold the container in place so that the open end is RIGHT above the anem with its petals basically touching the edges of the glass. Eventually the fish will swim down towards the exit and into the anemone. The first clown I did this with took a few minutes but once they touched, things got figured out quickly. The second clown swam down much faster since it saw its friend frolicking in the anem.
These were tank bred and they didn't even look at the anem before that for months. Now they don't come out...