The phrase "promising newcomer" means a person who is new to a field or activity, but has shown potential and is expected to be successful or do well in the future. Full definition
Here, in no particular order, we highlight 20 of the fair's most promising newcomers. (artsy.net)
Experienced professionals and promising newcomers who can do these jobs reliably are within reach. (resources.workable.com)
Mbatha - Raw, 31, is also up for most promising newcomer for her turn as a Caribbean slave's daughter who was raised as an aristocrat in 18th Century England. (benedict-cumberbatch.org)