Performing with a high degree of precision, as in when one "runs a clinic."

To be depressed, as in clinical depression.

A sports term usually used to describe a one sided beating in basketball in which one player gives another player such a thrashing on the court, that he or she looks like they are giving the losing opponent a "clinic" in how to play basketball.

To crush someone badly in a sport, mainly basketball.

A girl who has no health insurance, and therefore in order to stay healthy has an array of specialists that she sleeps with in exchange for medical care. Named the "clinic" because she has all the doctors inside of her

Used by some teenagers as a term to describe ass-kicking (can be non-physical as in winning a contest, etc).

Weed clinic. The place you get your medi marijuana.