Answer: completer

AnswerCrossword Clue
completerSkilled at every aspect of a particular activity; consummate
completerHaving all the necessary or appropriate parts
completerHaving run its full course; finished
completer(often used for emphasis) To the greatest extent or degree; total
completerCOMPLETE, having all necessary parts
completerEntire; full
completer(of all the works of a particular author) Collected together in one volume or edition