The most common and most likely answer to this crossword clue is the 4 plus 5 letter word FLAT BROKE
I've seen this crossword clue in The Times
F
L
A
T
B
R
O
K
E
More clues leading to the result FLAT BROKE
Buddy explains!
The straight part
We know that "cleaned out" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case cleaned out = flat broke.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.