Scribbly drawing (6)
I believe the answer is:
doodle
'scribbly drawing' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for doodle that I've seen before include "Squiggle idly" , "Draw aimlessly" , "Scribble idly" , "Scribble about old ode" , "Scribble meaninglessly, fiddle with pen" .)