I'm looking for a noun meaning "one who is adroit" or "one who is clever/skillful". Can I use the word "adroit" as a noun? All my googling has only turned up the noun-form "adroitness", which is clearly not what I'm after.
You could say that one who is adroit is a virtuoso.
Considering all the synonyms listed in Google's results:
skillful, adept, dexterous, deft, nimble, able, capable, skilled, expert, masterly, masterful, master, practiced, handy, polished, slick, proficient, accomplished, gifted, talented
master or expert seem to be among reasonable options.