Crossword puzzle clue "certain tube filler"

Here are the possible solutions for certain tube filler clue

Answer
Clue
Relevancy
neon
Clue
Certain tube filler
Glass tube filler
Definition
a gaseous element
air
Clue
Inner tube filler
Definition
the mixture of gases breathed by people and animals, also AYRE
argon
Clue
Vacuum tube filler
Definition
an inert gaseous element
icing
Clue
Pastry-tube filler
Definition
a sweet mixture for covering cakes
xenon
Clue
Radio-tube filler
Radio tube filler
diode
Clue
Certain vacuum tube
Definition
a type of electron tube

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