Empty seat on toilet's damaged by heel (8)
I believe the answer is:
stiletto
'heel' is the definition.
(stiletto heel is a kind of heel)
'empty seat on toilet's damaged' is the wordplay.
'empty' means to remove the middle letters.
'on' is a charade indicator (letters next to each other).
'damaged' indicates an anagram.
'seat' with its centre taken out is 'st'.
'toilet' anagrammed gives 'iletto'.
'st'+'iletto'='STILETTO'
'by' acts as a link.
(Other definitions for stiletto that I've seen before include "Item of footwear" , "Long dagger" , "Dagger with slender blade" , "Slender-bladed dagger - heel" , "Short dagger; shoe heel" .)