Event in Edinburgh that's superficially artistic? (6)
I believe the answer is:
tattoo
I believe this clue is a double definition.
'event in edinburgh' is the first definition.
(Edinburgh Military Tattoo)
'that's superficially artistic?' is the second definition.
(art on one's skin)
(Other definitions for tattoo that I've seen before include "Design on skin - military show" , "Needlework! - performed by soldiers!" , "drawing on arms, perhaps" , "that takes some beating?" , "signal to return to base" .)