Crossword puzzle clue "astronauts' go ahead signal"

Here are the possible solutions for astronauts' go ahead signal clue

Answer
Clue
Relevancy
aok
Clue
Astronauts' go-ahead signal
Go-ahead signal
clears
Clue
Gives the go-ahead signal.
Definition
CLEAR, to remove obstruction
greenlight
Clue
Go-ahead signal
Definition
to give the go-ahead
nod
Clue
"Go ahead" signal
Go-ahead signal
Definition
to give a quick forward motion of the head
roadsign
Clue
MERGE or SIGNAL AHEAD, e.g.
aborters
Clue
Apollo 13 astronauts, e.g.
Definition
ABORTER, one who aborts

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