Answer: HONER

AnswerCrossword Clue
HONERSkill sharpener
HONERKnife sharpener
HONERSharp-eyed one?
HONERPracticer
HONERPerfecter
HONERSword sharpener
HONEROne perfecting
HONEROne working on the cutting edge?
HONERSharp fellow?
HONERStropping person
HONERWhetting device
HONERSharpening device
HONERBlade sharpener, say
HONERHe whets
honerone that sharpens (to make sharp (capable of cutting or piercing))
honermake more acute, intense, or effective whet helped her hone her comic timing Patricia Bosworth
honerto sharpen or smooth with a whetstone
HONERSharpener
HONERStropper
HONERBarber, at times
HONERCutler, at times
HONEROne who sharpens
HONERWhetstone user
HONEROne who strops
HONERWhetstone user.
HONERSharpener.
HONERRazor sharpener.
HONERBlade sharpener.
HONEROne redefining the cutting edge
HONERStrop user
HONERBlade sharpener
HONEROne with an ax to grind
HONEROne making refinements