Painter who gets involved in yoga (4)
I believe the answer is:
goya
'painter' is the definition.
(Spanish painter Francisco Goya)
'involved in yoga' is the wordplay.
'involved in' indicates anagramming the letters (involved can mean complex or confusing).
'yoga' anagrammed gives 'GOYA'.
'who gets' acts as a link.
(Other definitions for goya that I've seen before include "Portrait painter" , "Old master" , "Eighteenth and nineteenth century Spanish painter" , "Span. C18 court painter" , "Spanish painter (Los Caprichos)" .)