Racing greyhound? (6)
I believe the answer is:
lapdog
'racing greyhound?' is the definition.
The answer and definition can be both animals as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'racing greyhound?' is the wordplay.
'racing' becomes 'lap' (I am not sure about this - if you are sure you should believe this answer much more).
'greyhound?' becomes 'dog' (greyhound is a kind of dog).
'lap'+'dog'='LAPDOG'
Can you help me to learn more?
(Other definitions for lapdog that I've seen before include "Small pet - sycophant" , "little pet" , "Small pampered pooch" , "devoted supporter" , "lackey" .)