The phrase "a master on a" is not correct in standard English usage.
It may be intended to convey expertise in a specific area, but it requires additional context or modification to be clear.
Example: "He is a master on a variety of subjects, particularly in philosophy."
Alternatives: "an expert in" or "a specialist in".
"He came of age, and learned to be a master, on a racial borderland where the definitions and boundaries of race were dangerously fluid," Mr. Wiencek writes.
An exhibition of her images from the photographic archive of the American Academy in Rome is at City University's Graduate Center in Midtown, and it firmly establishes this virtually unknown photographer as a master on a par with Francis Frith, Henri Le Secq, Felix Teynard and James McDonald.
He is funny about S&M and the inconvenient disjunctions of fantasy from normal day-to-day life: ordered by a "master" on a website to relocate to Cleveland and live in a cage for the rest of his life, he thinks: "But I must finish my semester at Princeton, then there's Rome in June and Provence in July..."...
"I venture to doubt whether any other bowler of his type has proved such a master on all wickets," he said in a speech to the assembled players and spectators.
Take it from me, I am a master on how one person inadvertently creates a world of destruction.
She hopes to fight trafficking and the sexual exploitation of underage girls, and says: "I earned a masters on the street, a doctorate of experience.
Two bogeys in the last two holes with a Masters on the line does not suggest a player entirely at ease with his game.
Research this profession and write an article describing what it means to be a prop master on a film crew and what is would take to become one.
Colonial officials were told that crates of documents sent back to the UK by sea could be entrusted only to the "care of a British ship's master on a British ship".
