Home cup tie? (4)
I believe the answer is:
semi
I believe this clue is a double definition.
'home' is the first definition.
(short for semi-detached)
'cup tie?' is the second definition.
(semi-final is a type of cup tie)
(Other definitions for semi that I've seen before include "The last but one round" , "House sharing a wall" , "A whole house (or half?)" , "Not quite the biggest tie" , "match, the last but one?" .)