Membrane’s elasticity accepted? There’s risk about that (10)

I believe the answer is:
peritoneal
'membrane's elasticity accepted? there's risk about that' is the definition.
I can't judge whether this definition defines the answer.
'membrane's elasticity accepted? there's risk about that' is the wordplay.
'membrane's elasticity' becomes 'tone' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'accepted?' becomes 'a' (financial abbreviation).
'there's' means one lot of letters go next to another.
'risk' becomes 'peril' (synonyms).
'about that' means one lot of letters goes inside another.
'tone'+'a'='tonea'
'tonea' placed within 'peril' is 'PERITONEAL'.
Can you help me to learn more?
