Yahoo hasn’t left, that’s nice (7)
I believe the answer is:
peasant
'yahoo' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for peasant that I've seen before include "Agricultural labourer of low status" , "Poor country worker" , "Poor farmworker" , "Revolting person" , "Poor rustic" .)