Crossword puzzle clue "artists and writers gp"

Artist and chess player who said "While all artists are not chess players, all chess players are artists"

Artists and writers gp.

He said "Most editors are failed writers - but so are most writers"

Poet who said "Most editors are failed writers - but so are most writers"

Trucker's medium, and a hint to the artists in this puzzle

Patron saint of artists and smiths

"Wrong Way Up" artists Cale and ___

Excuse given by those who hire artists and pay nothing