Red flower for family (5)
I believe the answer is:
blood
'for family' is the definition.
(blood can mean one's family)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for blood that I've seen before include "Become the duty of" , "vital liquid" , "Circulating red liquid" , "Oxygen-carrying liquid" , "Fiery temperament" .)