The most common and most likely answer to this crossword clue is the 9 letter word UNSHIPPED
I've seen this crossword clue in Financial Times
U
N
S
H
I
P
P
E
D
Buddy explains!

The straight part
We know that "Offloaded" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case offloaded = unshipped.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.
Crossword Answer definitions
UNSHIPPED verb- To unload cargo from a ship or other vessel
- To remove an oar or mast from its normal position
- To throw from a horse; to unseat
- Not having been shipped.