The most common and most likely answer to this crossword clue is the 8 letter word RESIDUAL
I've seen this crossword clue in Financial Times
R
E
S
I
D
U
A
L
More clues leading to the result RESIDUAL
- Excess praise is given to monarch returning
- Remaining one in residence made for two
- Used rail transport and left
- Is rude about almost everyone remaining
- Net found in Sid Vicious’s penultimate appearance in football team
- Review rules aid surplus
- Excess praise before one’s Queen, all rising
- Remaining uplifting, praise one’s Queen
- Excess praise one’s Queen rejected
- Left-over rail used for modelling
Buddy explains!

The straight part
We know that "left" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case left = residual.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 RESIDUAL mean?
RESIDUAL noun- A remainder left over at the end of some process.
- (in the plural) Payments made to performers, writers and directors when a recorded broadcast is repeated.
- The difference between the observed value and the estimated value of the quantity of interest
- (paranormal) A spiritual presence left behind in a place as a result of a person's death or some other significant event.
- Of, relating to, or remaining as a residue; left over.