Painter of melting clocks (4)
I believe the answer is:
dali
'painter of melting clocks' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for dali that I've seen before include "Salvador -, twentieth century artist" , "Salvador --, twentieth century Spanish surrealist painter" , "Salvador . . . . was great Spanish surrealist painter" , "Tree" , "Salvador among artists" .)