A tortuous clue somehow about the Spanish painter (8-7)
I believe the answer is:
toulouse-lautrec
'painter' is the definition.
(I know that Toulouse-Lautrec is a painter)
'a tortuous clue somehow about the spanish' is the wordplay.
'somehow' indicates anagramming the letters.
'about' means one lot of letters goes inside another.
'the spanish' becomes 'el' ('the' in Spanish).
'a'+'tortuous'+'clue'='atortuousclue'
'atortuousclue' with letters rearranged gives 'toulousautrec'.
'toulousautrec' going around 'el' is 'TOULOUSE-LAUTREC'.
(Another definition for toulouse-lautrec that I've seen is " French painter, d. 1901".)