Daughter sends back Spanish chicken - shapeless mass (6)
I believe the answer is:
dollop
'shapeless mass' is the definition.
(I've seen this before)
'daughter sends back spanish chicken' is the wordplay.
'daughter' becomes 'd' (genealogical abbreviation).
'sends back' says the letters should be written in reverse.
'spanish chicken' becomes 'pollo' ('chicken' in Spanish).
'pollo' reversed gives 'ollop'.
'd'+'ollop'='DOLLOP'
(Other definitions for dollop that I've seen before include "serving food, perhaps" , "Shapeless mass or lump" , "Large piece" , "Big spoonful" , "A shapeless lump of something soft, like dough" .)