Clinic does not require equipment.  A standard lacrosse stick is the only requirement for clinic. For all other age groups the required equipment is:
Lacrosse stick - Stick length rules vary for the younger age groups. Check with your coach or AGC if you have a question
Helmet - A NOCSAE approved protective helmet, equipped with face mask, chin pad, and a cupped four point chin strap
Mouthpiece
Lacrosse gloves
Shoulder pads and arm pads - Required for all players with the exception of goalies
Throat and chest protector -The goalkeeper is required to wear a throat protector and chest protector, in addition to a helmet, mouthpiece, gloves, and a protective cup
Rib pads are optional but highly recommended, as are athletic supporters and protective cups for all players. For more information about proactive equipment, see the US Lacrosse website.