Son put away stuff (4)
I believe the answer is:
'stuff' is the definition.
'son put away' is the wordplay.
'son' becomes 's' (genealogical abbreviation for son).
'put away' becomes 'ate' (I've seen this in other clues).
(Other definitions for sate that I've seen before include "Malaysian dish" , "Supply to excess" , "replete" , "Fulfil to excess" , "Satisfy more than fully" .)