The most common and most likely answer to this crossword clue is the 4 letter word SALE
I've seen this crossword clue in Financial Times
S
A
L
E
More clues leading to the result SALE
- A form of willow selling in northern town
- Bargain time that’s dirty in 11
- Deal is small beer
- After It, sign detailed deal
- Opportunity to purchase small beer
- What shop may put on in part of Greater Manchester
- Special Brew on offer
- Sharks from Greater Manchester initially spiked drink
- Beyond its shelf life’s no time to be selling
- Deal offers second drink
Buddy explains!

The straight part
We know that "Deal" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case deal = sale.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 SALE mean?
SALE noun- A hall.
- An exchange of goods or services for currency or credit.
- (Short for discount sale) The sale of goods at reduced prices.
- The act of putting up for auction to the highest bidder.