The most common and most likely answer to this crossword clue is the 9 letter word ABSCONDER
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More clues leading to the result ABSCONDER
- Escapee a rubbish criminal communist turned over
- Fugitive and criminal donning false beards
- End of race overlooked, supporter follows a black runner
- Sailors trick the German one doing runner
- Fugitive running Bond’s race
- Sailors fool the German escaper
- A graduate bolshie about guards touching runaway
- Sailor needs helper — not the first English person to do a bunk
Buddy explains!

The straight part
We know that "one doing runner" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one doing runner = absconder.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.