The most common and most likely answer to this crossword clue is the 11 letter word DIVE-BOMBED
I've seen this crossword clue in Financial Times
D
I
V
E
-
B
O
M
B
E
D
Buddy explains!
The straight part
We know that "pounded from above" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case pounded from above = dive-bombed.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.