Top title (5)
I believe the answer is:
crown
I believe this clue is a double definition.
'top' is the first definition.
(I know that crown is a type of top)
'title' is the second definition.
(thesaurus)
(Other definitions for crown that I've seen before include "Old five shilling piece" , "Coronet" , "'Uneasy lies the head that wears a . . . . .'" , "Coin; royal headgear" , "Headdress, coin" .)