Cry as water’s broken inside baby’s membrane (9)
I believe the answer is:
caterwaul
'cry' is the definition.
(caterwaul is a kind of cry)
'water's broken inside baby's membrane' is the wordplay.
'broken' indicates an anagram.
'inside' indicates putting letters inside.
'baby's membrane' becomes 'caul' (I am not sure about this - if you are sure you should believe this answer much more).
'water' anagrammed gives 'aterw'.
'aterw' inserted into 'caul' is 'CATERWAUL'.
'as' is the link.
Can you help me to learn more?
(Other definitions for caterwaul that I've seen before include "queen's complaint" , "Make feline howl about curate law" , "howl unpleasantly" , "Feline shriek - cult aware (anag)" , "(Make) a yowling sound" .)