Answer:

scabs

AnswerCrossword Clue
SCABSLine-crossers, perhaps
SCABSStrikebreakers
SCABSStrike-breakers
SCABSPicket-line crossers
SCABSUnion's foes
SCABSStrike-defying finks
SCABSPicket line crossers
SCABSThey work during strikes
SCABSThey might dispute a strike call
SCABSWound covers
SCABSSigns of healing
SCABSReplacement players, perhaps
SCABSUnpopular workers
SCABSUnion enemies
SCABSCertain line-crossers
SCABSHealing signs
SCABSWorkers who cross picket lines
SCABSNatural skin protection
SCABSUnion's bane
SCABSLine crossers
SCABSThey can be picked off
SCABSThey might get swung at if they go through the strike zone
SCABSStrike-breakers.
SCABSIncrustations.
SCABSMementos of abrasions
SCABSStrikers' nemeses
SCABSFinks
SCABSScotch fiddles
SCABS'Taint buses
SCABS"Scotch fiddles"
SCABSPlant diseases
SCABSEschars
SCABSUnion targets
SCABSUnion flouters
SCABSTemporary protectors
SCABSSore spots?
SCABSStrike breakers
SCABSUnion foes
SCABSPicket provokers
SCABSReplacement refs, maybe?