The most common and most likely answer to this crossword clue is the 6 letter word FAIRER
I've seen this crossword clue in The Guardian
F
A
I
R
E
R
More clues leading to the result FAIRER
- More light from flames either side of a river
- Less inclined to show bias as female broadcaster?
- Lighter and warmer finally, after a fire is lit
- Lighter, just going round about
- Prettier elf, not unknown to hesitation
- More sporting provisions in report on rider’s backers
- Cleaner‘s fine contraption for drying
- Cleaner river in France
- ‘More just do right’ the compiler admitted
- A long way to carry one about — should be lighter
Buddy explains!

The straight part
We know that "More sporting" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case more sporting = fairer.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 FAIRER mean?
FAIRER adjective- Beautiful, of a pleasing appearance, with a pure and fresh quality.
- Unblemished (figuratively or literally); clean and pure; innocent.
- Light in color, pale, particularly with regard to skin tone but also referring to blond hair.
- Just, equitable.
- Adequate, reasonable, or decent.
- (of a wind) Favorable to a ship's course.
- Not overcast; cloudless; clear; pleasant; propitious; said of the sky, weather, or wind, etc.
- Free from obstacles or hindrances; unobstructed; unencumbered; open; direct; said of a road, passage, etc.
- Without sudden change of direction or curvature; smooth; flowing; said of the figure of a vessel, and of surfaces, water lines, and other lines.
- Between the baselines.
- (of a catch) Taken direct from an opponent's foot, without the ball touching the ground or another player.
- (of a ball delivered by the bowler) Not a no-ball.
- Of a coin or die, having equal chance of landing on any side, unbiased.