Barrage on the beach? (9)
I believe the answer is:
shellfire
'barrage' is the definition.
(I've seen this before)
'on the beach?' is the wordplay.
I cannot quite see how this works, but
'on' could be 're' ('on' can be mean 'with reference to') and 're' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for shellfire that I've seen before include "use of artillery" , "an experience of war" , "Bombardment from heavy artillery" , "Act of war" , "What generates multiple reports" .)