Some men go loco over perfume (7)
I believe the answer is:
cologne
'perfume' is the definition.
(I know that cologne is a type of perfume)
'some men go loco over' is the wordplay.
'some' indicates a hidden word (some parts of the word are used).
'over' says the letters should be written backwards.
'engoloc' is hidden in the letters of 'men go loco'.
'engoloc' back-to-front is 'COLOGNE'.
(Other definitions for cologne that I've seen before include "Eau de _____" , "smells nice" , "German city and mild perfume" , "Perfumed liquid made of oils and alcohol" , "Foreign city" .)