“Duck!” woman cried out (5)
I believe the answer is:
eider
'duck' is the definition.
(eider is a type of duck)
'woman cried out' is the wordplay.
'woman' becomes 'Ida' (woman's name).
'cried out' indicates a 'sounds like' (homophone) clue.
'ida' is a homophone of 'EIDER'.
(Other definitions for eider that I've seen before include "Sea duck with soft down" , "Large sea duck" , "Down comes from this" , "Down's source" , "Reed I turn into a duck" .)