Sketches, illustrations by hand (8)
I believe the answer is:
drawings
This clue is a double definition.
'sketches' is the first definition.
(I've seen this before)
'illustrations by hand' is the second definition.
(I've seen this before)
(Other definitions for drawings that I've seen before include "Cleaned with water" , "Sketches or draughts" , "Illustrations by hand" , "Illustrations, draft plans" .)