Someone whose occupation is making or repairing clocks and watches(noun)
WordNet. Princeton University. 2010.
Use "clocksmith" in a sentence
"Lory had not found the gold, he had not pieced together with the patience of a clocksmith the wheels within wheels that Colonel Gilbert had constructed through the careful years."
"I've been forced to send my watch to the clocksmith."
"Inspired by what he had learned of Whitney's undertaking, Eli Terry, a clocksmith of Plymouth, Connecticut, announced that he was building five hundred clocks - all of the same, identical design - which he would sell for around $10 each, as against the customary price of"