Aristocrat broke bone around top of ledge (5)
I believe the answer is:
noble
'aristocrat' is the definition.
(noble is a kind of aristocrat)
'broke bone around top of ledge' is the wordplay.
'broke' indicates an anagram.
'around' indicates putting letters inside.
'top of' indicates taking the first letters.
The initial letter of 'ledge' is 'l'.
'bone' with letters rearranged gives 'nobe'.
'nobe' going around 'l' is 'NOBLE'.
(Other definitions for noble that I've seen before include "with a title?" , "aristocrat, maybe" , "Eminent" , "Illustrious - of high birth - old gold coin" , "Former gold coin" .)