Preliminary drawing (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">preliminary drawing</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for sketch that I've seen before include "Simple drawing" , "Outline - preliminary drawing" , "Short comic scene" , "Short account" , "result of quick draw?" .)
(Other definitions for study that I've seen before include "Den; a practice drawing" , "Swot" , "Work-room" , "(Room for) academic work" , "Dusty (anag.)" .)