It’s located through the rear right exits from flat (8)
I believe the answer is:
prostate
'right exits from flat' is the definition.
The answer and definition can be both body parts as well as being singular nouns.
Maybe there's an association between them I don't understand?
'it's located through the rear' is the wordplay.
I cannot really understand how this works, but
'the' could be 't' (the is pronounced as a 't' sound in some dialects) and 't' is found within the answer.
'it' could be 'sa' (SA can mean sex appeal, as in 'it') and 'sa' is found in the leftover letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for prostate that I've seen is " A protest about a troublesome male gland".)