They're fit to be tied (5)
I believe the answer is:
laces
'they're fit to be tied' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for laces that I've seen before include "Scale for boot fasteners" , "Shoe ties" , "Scale for shoe fasteners" , "Scale for shoe securers" , "Cords for tying shoes" .)