Answer: inkspot

AnswerCrossword Clue
INKSPOTA cappella group member
INKSPOT1940s vocal quartet member
INKSPOTLaundry challenge
INKSPOTResult of a leaky pen
INKSPOT"If I Didn't Care" group member
INKSPOTStain.
INKSPOTIvory Watson or Charlie Fuqua, e.g.
INKSPOTPen user's stain
inkspota small ink stain