Stop mutated mice native to a particular area (7)
I believe the answer is:
endemic
'native to a particular area' is the definition.
I can't tell whether this defines the answer.
'stop mutated mice' is the wordplay.
'stop' becomes 'end' (synonyms).
'mutated' is an anagram indicator.
'mice' anagrammed gives 'emic'.
'end'+'emic'='ENDEMIC'
Can you help me to learn more?
(Other definitions for endemic that I've seen before include "Confined to (disease)" , "Local, indigenous" , "Only found in a particular region, or regions" , "Prevalent among a group of people, disease perhaps" , "(Of disease) regularly found in population" .)