A little shade's ignored in sketch (6)
I believe the answer is:
design
'sketch' is the definition.
(design is a kind of sketch)
'a little shade's ignored in' is the wordplay.
'a little' indicates a hidden word.
'DESIGN' can be found hidden inside 'shades ignored in'.
(Other definitions for design that I've seen before include "Signed off on blueprint" , "Purpose, pattern" , "Aim -- decorative pattern" , "Signed up for fashion plan" , "Prepare a drawing or model" .)