Painter late in the morning rising (5)
I believe the answer is:
manet
'painter' is the definition.
(I know that Manet is a painter)
'late in the morning rising' is the wordplay.
'late' becomes 'ten' (I can't explain this - if you can you should give a lot more credence to this answer).
'in the morning' becomes 'am' (AM on a clock).
'rising' says the letters should be written in reverse (letters written upwards in a down clue).
'ten'+'am'='tenam'
'tenam' reversed gives 'MANET'.
Can you help me to learn more?
(Other definitions for manet that I've seen before include "Olympia painter" , "Painter of Le Dejeuner sur l'herbe, d. 1883" , "Edouard -- (artist)" , "Olympia artist" , "French painter" .)