Crossword puzzle clue "they're used to send secret messages"

Here are the possible solutions for they're used to send secret messages clue

Answer
Clue
Relevancy
codes
Clue
They're used to send secret messages
Definition
CODE, to convert into symbols
morse
Clue
___ code (system used to send telegraph messages)
Definition
(French) a walrus
telecom
Clue
Systems used to send messages electronically
sext
Clue
Send racy messages online
Send private messages?
Send private messages
Send naughty messages via smartphone
sextinline
Clue
Send dirty messages while waiting at the DMV, say?

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