Binder with uglier tab cut off (8)
I believe the answer is:
ligature
'binder' is the definition.
(I know that binder can be written as ligature)
'uglier tab cut off' is the wordplay.
'cut' means to remove the last letter.
'off' is an anagram indicator.
'uglier'+'tab'='ugliertab'
'ugliertab' with its last letter removed is 'uglierta'.
'uglierta' with letters rearranged gives 'LIGATURE'.
'with' is the link.
(Other definitions for ligature that I've seen before include "Thread used in surgery to stop internal bleeding" , "that flute could begin with" , "Something used to tie" , "Character combining two letters" , "Cord for tying blood-vessels" .)