The most common and most likely answer to this crossword clue is the 6 letter word FROZEN
I've seen this crossword clue in Financial Times
F
R
O
Z
E
N
Buddy explains!

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.
What does FROZEN mean?
FROZEN verb- Especially of a liquid, to become solid due to low temperature.
- To lower something's temperature to the point that it freezes or becomes hard.
- To drop to a temperature below zero degrees celsius, where water turns to ice.
- To be affected by extreme cold.
- (of machines and software) To come to a sudden halt, stop working (functioning).
- (of people and other animals) To stop (become motionless) or be stopped due to attentiveness, fear, surprise, etc.
- To cause someone to become motionless.
- To lose or cause to lose warmth of feeling; to shut out; to ostracize.
- To cause loss of animation or life in, from lack of heat; to give the sensation of cold to; to chill.
- To prevent the movement or liquidation of a person's financial assets
- Of prices, spending etc., to keep at the same level, without any increase.
- Having undergone the process of freezing; in ice form.
- Immobilized.
- (of a bank account or assets) In a state such that transactions are not allowed.