The most common and most likely answer to this crossword clue is the 3 plus 5 letter word LOW TIDES
I've seen this crossword clue in The Daily Telegraph
L
O
W
T
I
D
E
S
Buddy explains!
The straight part
We know that "Daily withdrawals of liquidity from the banks" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case daily withdrawals of liquidity from the banks = low tides.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.