Where the witches could have been males (5)
I believe the answer is:
salem
'where the witches could' is the definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.
'been males' is the wordplay.
'males' can be anagrammed to 'SALEM'.
However, I'm not sure how this is indicated.
'have' acts as a link.
Can you help me to learn more?
(Other definitions for salem that I've seen before include "OT Hebrew capital" , "Witch trial town" , "Scene of witch trials" , "where possessions were claimed?" , "US witch-trial town" .)
