Remember: it reaches stretch in Africa (7)
I believe the answer is:
eritrea
'africa' is the definition.
The answer and definition can be both locations as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'remember it reaches stretch in' is the wordplay.
'in' says the answer is hidden in the clue.
'ERITREA' can be found hidden inside 'remember it reaches stretch'.
Can you help me to learn more?
(Other definitions for eritrea that I've seen before include "Eire art (anag)" , "African country, capital Asmara" , "part of Africa" , "NE African state" , "Country of northeast Africa" .)