clerkship

noun

1. (countable, uncountable)The state or business of a clerk.

   “Queen Mary of the Iron Road. By Fred C. Bishop. […] This is the life-story of a boy who was determined to become an engine driver, and who lost no time in realising his ambition. A bold plunge from a clerkship in a coal merchant's office carried Fred Bishop, at the age of 14, into the locomotive department of the London & North Western Railway.”

2. (countable, uncountable)A temporary job of assisting a judge in writing legal opinions, generally available to a beginning attorney for one to two years.
3. (countable, uncountable)Clinical training for physicians during the second half of medical school.