Answer: tarnish

AnswerCrossword Clue
TARNISH

Stain, as a rep

TARNISH

Lose luster

TARNISH

Stain

TARNISH
Stain, as a reputation
TARNISH
Taint
TARNISHSully
TARNISHSilver flaw
TARNISHSully.
TARNISHGrow dull.
TARNISHDiscolor.
TARNISHStain.
TARNISHDiscoloration
TARNISHBesmirchment
TARNISHDestroy the luster
TARNISHBesmirch
TARNISHStain produced by end of crayon in his art, unfortunately (7)