A French master (5)

I believe the answer is:

corot

I'm a little stuck... Click here to teach me more about this clue!

'a french master' is the definition.
The definition suggests a singular noun which matches the answer.

This is all the clue.

Can you help me to learn more?

(Other definitions for corot that I've seen before include "French artist" , "French landscape painter, d. 1875" , "He painted" , "Fr. landscape artist, d. 1875" , "Barbizon School artist" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app