The term 'Mona Lisa, for one' is a reference to the famous painting by Leonardo da Vinci. The crossword solutions for this term are SIGNORA (7 letters), OIL (3 letters), PORTRAIT (8 letters), and OILPAINTING (11 letters). Signora is an Italian title of respect used for a married woman, which is likely a reference to the subject of the painting, Lisa Gherardini. OIL is a reference to the medium used to create the painting, as it is an OIL painting. PORTRAIT is a reference to the genre of the painting, as it is a PORTRAIT of Lisa Gherardini. Oilpainting is a reference to the medium used to create the painting, as it is an OIL painting.