I call it “craft” and not “art” for connotative reasons. “Art” conjures an image of the lexicographer as medium or conduit—a live wire that merely transmits something unkenned, alien. But “craft” implies care, repetitive work, apprenticeship, and practice. It is something that is within most people’s reach, but few people devote themselves to it long enough and with enough intensity to do it well.
Nice distinction
