Women's organisation feeding favourite shore bird (5)
I believe the answer is:
pewit
'shore bird' is the definition.
(I know that pewit is a type of plover)
'women's organisation feeding favourite' is the wordplay.
'women's organisation' becomes 'wi' (abbreviation for Women's Institute).
'feeding' means one lot of letters goes inside another (one word is fed by another set of letters).
'favourite' becomes 'pet' (synonyms).
'wi' put into 'pet' is 'PEWIT'.
(Other definitions for pewit that I've seen before include "Lapwing" , "Bird" .)