The most common and most likely answer to this crossword clue is the 8 letter word STREAKER
I've seen this crossword clue in The Guardian
S
T
R
E
A
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R
More clues leading to the result STREAKER
- One who unevenly paints nude on the run?
- I run out of gear usually where others score
- Fast runner who’s barely noticed?
- One shows bit of rump with little hesitation? About right!
- One who is barely recognisable running in a public place
- Keen exhibitionist just starting run — under arrest potentially right away?
- One running out of gear?
- Someone not suited for running
- Runner stripped of sporting fame
- One making pitch, showing bits off
Buddy explains!

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 STREAKER mean?
STREAKER noun- One who runs naked through a public place as a prank.
- The dolphin Stenella coeruleoalba.