Answer:

thinner

AnswerCrossword Clue
THINNERAgent in paints
THINNERTurpentine, e.g.
THINNERIt's used for the sake of consistency
THINNERNot so bulky
THINNERPaint additive
THINNERLess corpulent
THINNERRichard Bachman novel
THINNERMore diluted.
THINNERMore svelte.
THINNERLiquid added to paint.
THINNERAdditive to paint.
THINNERTurpentine, for example.
THINNERTurpentine, for one.
THINNERTurpentine, at times
THINNERPainter's aid
THINNEROppothite of a thaint
THINNERMore emaciated
THINNERTurps, for one