The most common and most likely answer to this crossword clue is the 9 letter word GREYHOUND
G
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H
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D
More clues leading to the result GREYHOUND
- Dry enough exercising dog
- Spooner's dry grass, territory that would do for dog
- Uranium in hydrogen compound? Want to bet on it?
- Uranium/hydrogen compound in canine
- Dog worrying young herd
- Badger follows lack-lustre American bus?
- Dull chase for a speedy dog.
- Dog of small height you brought up in sports field?
- Deny rough treatment of lap-dog?
- Ground dry enough for racer
Buddy explains!

The straight part
We know that "racer" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case racer = greyhound.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 GREYHOUND mean?
GREYHOUND noun- A lean breed of dog used in hunting and racing.
- A highball cocktail of vodka and grapefruit juice.
- A swift steamer, especially an ocean steamer.
- (of fish) To leap rapidly across the surface of the water.