Crossed Bury, needing basic food picked up (9)
I believe the answer is:
interbred
'crossed' is the definition.
(synonyms)
'bury needing basic food picked up' is the wordplay.
'bury' becomes 'inter' (to inter is to put into the ground).
'needing' is a charade indicator (letters next to each other).
'basic food' becomes 'bread' (staple food).
'picked up' indicates a 'sounds like' (homophone) clue.
'bread' is a homophone of 'bred'.
'inter'+'bred'='INTERBRED'
(Other definitions for interbred that I've seen before include "produced within the family" , "Crossed (two species)" , "Mixed across species" , "Maybe like unusual animal" , "combined with another race" .)