Lashing out, striking husband making gesture (6)
I believe the answer is:
signal
'gesture' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for signal that I've seen before include "Gesture to convey information" , "Gesture of communication" , "Gesture or object giving information" , "Gesture encoding a message" , "Noteworthy" .)