Artist daubed only in crimson and scarlet? (8)
I believe the answer is:
reynolds
'artist' is the definition.
(I've seen this before)
'daubed only in crimson and scarlet?' is the wordplay.
'daubed' is an anagram indicator (to daub is to spread something clumsily).
'in' is an insertion indicator.
'crimson and scarlet?' becomes 'reds' (I've seen this in another clue).
'only' with letters rearranged gives 'ynol'.
'ynol' put within 'reds' is 'REYNOLDS'.
(Other definitions for reynolds that I've seen before include "Joshua -, C 18 painter" , "Sir Joshua -, 18th century English painter" , "5 [PORTRAINT PAINTER]" , "Sir Joshua ---, portraitist" , "Burt -, US actor" .)