Terminate mice problem - it's common (7)
I believe the answer is:
endemic
'common' is the definition.
Both the definition and answer are adjectives. Perhaps they are linked in a way I don't understand?
'terminate mice problem' is the wordplay.
'terminate' becomes 'end' (synonyms).
'problem' indicates an anagram.
'mice' anagrammed gives 'emic'.
'end'+'emic'='ENDEMIC'
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for endemic that I've seen before include "(Of disease) regularly found in population" , "(Of disease) widespread in an area" , "Native to (med.)" , "Prevalent among a group of people, disease perhaps" , "Commonly found in particular place - may be disease" .)