The most common and most likely answer to this crossword clue is the 3 letter word SUM
I've seen this crossword clue in Financial Times
S
U
M
More clues leading to the result SUM
- Tot in poor area, beginning to lose out
- Everything, or just part, for an audience
- All left needing to escape poor area
- Problem with German missing top meeting
- Problem with wrestling, nothing less
- A lot of wrestling in total
- Problem needing solution originally, let me think
- Presumably contains a quantity of money
- Problem part being discussed
- Southern Greek character raised total
Buddy explains!

The straight part
We know that "total" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case total = sum.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 SUM mean?
SUM noun- A quantity obtained by addition or aggregation.
- (often plural) An arithmetic computation, especially one posed to a student as an exercise (not necessarily limited to addition).
- A quantity of money.
- A summary; the principal points or thoughts when viewed together; the amount; the substance; compendium.
- A central idea or point; gist.
- The utmost degree.
- An old English measure of corn equal to the quarter.
- To add together.
- To give a summary of.
- The basic unit of money in Kyrgyzstan.
- The basic unit of money in Uzbekistan.
- A certain number, at least two.
- An indefinite quantity.
- An indefinite amount, a part.
- A type of administrative district used in China, Mongolia, and Russia. In Mongolia, a somon is smaller than a province. In China, it is only used in Inner Mongolia where it is equivalent to a township.