Answer: fins

AnswerCrossword Clue
FINSOn the three little fishes.
FINSFifties auto feature
FINSChange for a ten-spot
FINSLincoln notes, slangily
FINS'50s auto features
FINSRadiator parts
FINSScuba diver's footwear
FINSOld T-bird features
FINSFeatures on cars of the '50s
FINSStabilizers.
FINSSubmarine attachments.
FINSSwimming aids
FINSCrossed fingers, in a child's game.
FINSProjecting ribs of a radiator.
FINSAirfoils.
FINSEmbellishment on cars.
FINSPectoral, dorsal, etc.
FINSMarine appendages.
FINSFlippers.
FINSSea robin's specialty.
finsFIN, to equip with paddle like structures
FINSGoldfish propellers
FINSSawbuck halves
FINSFivers
FINSSurfboard stabilizers
FINSCod pieces
FINSAerodynamic stabilizers
FINSBygone auto "tail" ornaments
FINSBygone Detroit styling features
FINSUnderwater steering mechanisms
FINSUnderwater directors
FINSFlippers
FINSOrgans used for propulsion
FINSFive-spots
FINSFish features
FINSSnorkeler's footwear
FINSFlipper's flippers
FINSWarnings of impending shark attacks, maybe
FINSDolphins have them
FINSSwimmers' aids