I would second Doug Zaruba’s comment about Alan Revere’s book
"Professional Goldsmithing’ and the example of the box clasp. It is
simply a matter of repetition and practice to increase one’s
proficiency and improve the quality of the mechanics.
I have never found clasps to be the easiest components to make
although almost every item I create includes one. My advice at the
beginning would be don’t allow yourself to be frustrated by your
first attempts. Following the thoughtful instruction of the book’s
presentation in a careful manner and with close attention to detail
will insure that your finished clasp makes the obligatory audible
snap when it closes, and you will feel a real sense of accomplishment
as your reward.
Happy hammering (as Alan would say),