The most common and most likely answer to this crossword clue is the 6 letter word FLAUNT
I've seen this crossword clue in The Guardian
F
L
A
U
N
T
More clues leading to the result FLAUNT
- Show off extremely faithful relative
- Gossip after Liechtenstein show off
- Show off foreign article in apartment
- Draw attention to a Parisian imprisoned in apartment
- Loud relative left before display
- Sport paper featuring foreign articles
- Show off apartment crammed with unlimited junk
- Female learner and relation in parade
- Show off note about article from Dior, peut-ĂȘtre?
- Ostentatiously display fraternal love, initially, in front of relative
Buddy explains!

The straight part
We know that "Sport" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case sport = flaunt.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 FLAUNT mean?
FLAUNT noun- Anything displayed for show.
- To wave or flutter smartly in the wind.
- To parade, display with ostentation.
- To show off, as with flashy clothing.
- To flout.