The most common and most likely answer to this crossword clue is the 7 letter word GESTURE
G
E
S
T
U
R
E
More clues leading to the result GESTURE
- Greet us, somehow giving signal
- Signal from visitor dropping union leader on river
- Greet us waving, perhaps?
- Greet us with waving action
- Sign gets a bit mangled by river
- Greet us clumsily and wave
- Act of guest, awfully touching
- Fearful urge set in motion
- Signal gets half-confused on river
- Get user rebooted with such a handy expression
Buddy explains!

The straight part
We know that "Signal" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case signal = gesture.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does GESTURE mean?
GESTURE noun- A motion of the limbs or body, especially one made to emphasize speech.
- An act or a remark made as a formality or as a sign of attitude.
- The manner of carrying the body; position of the body or limbs; posture.
- To make a gesture or gestures.
- To express something by a gesture or gestures.
- To accompany or illustrate with gesture or action.