Answer: slubbed

AnswerCrossword Clue
slubbedthe fibers produced by slubbing
slubbedto extend (slivers of fiber) and twist slightly in carding
slubbedSLUB, to draw out and twist slightly, also SLUBB
slubbedslight irregularity in yarn produced either accidentally or purposely by knotting or twisting or by including uneven lengths of fiber in spinning