Where you may find some house mice? (4)
I believe the answer is:
semi
'where you may' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'some house mice?' is the wordplay.
'some' indicates a hidden word (some parts of the word are used).
'SEMI' is hidden within 'house mice'.
'find' acts as a link.
Can you help me to learn more?
(Other definitions for semi that I've seen before include "match, the last but one?" , "Not detached house" , "Prefix denoting half" , "Prefix meaning half or partly" , "eg Half a house" .)