Cracked bone enthrals one proud parent (5)
I believe the answer is:
niobe
'proud parent' is the definition.
The definition suggests a singular noun which matches the answer.
'cracked bone enthrals one' is the wordplay.
'cracked' indicates anagramming the letters.
'enthrals' indicates putting letters inside.
'one' becomes 'i' (Roman numeral).
'bone' with letters rearranged gives 'nobe'.
'nobe' going around 'i' is 'NIOBE'.
Can you help me to learn more?
(Other definitions for niobe that I've seen before include "figure of myth" , "She cried" , "woman of sorrows" , "Tearful young woman" , "Mother, her children slaughtered" .)