God round daughter at home (4)
I believe the answer is:
odin
'god' is the definition.
(Norse god)
'round daughter at home' is the wordplay.
'round' becomes 'o' (round can mean a round object).
'daughter' becomes 'd' (genealogical abbreviation).
'at home' becomes 'in' ('I'm in' can mean 'I'm at home').
'o'+'d'+'in'='ODIN'
(Other definitions for odin that I've seen before include "The supreme Norse god and creator" , "I nod to the Norse deity" , "mythological personage" , "Norse god, husband of Frigg, father of Thor" , "Supreme god of war in Norse mythology" .)