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.
Adept can be used as a noun meaning exceptionally skilled at one thing or many things in general. It's a bit archaic to use it as a noun, but I suppose adroit isn't all that common a word, either. :)
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.
I've never seen adroit used as a noun that way. Consider using expert as an alternative.