Answer: thumbnail

AnswerCrossword Clue
THUMBNAILType of sketch
THUMBNAILSketch type
THUMBNAILConcise, like a sketch
THUMBNAILBrief, as a description
THUMBNAILConcise, as a sketch
THUMBNAILSaid of a small sketch.
THUMBNAILKind of sketch
THUMBNAIL... sketch (concise description)
thumbnailthe nail of the thumb; a sketch as small as a thumbnail
thumbnailthe nail of the thumb
thumbnailbrief and concise