Gesture from breaker (4)
I believe the answer is:
wave
I believe this is a double definition.
'gesture' is the first definition.
(wave is a kind of gesture)
'breaker' is the second definition.
(a wave 'breaks' on the shore)
'from' acts as a link.
(Other definitions for wave that I've seen before include "Roller - breaker" , "Shake a hand in the air" , "Billow" , "White Horse" , "Roller; a gesture" .)