Half of relatives must support hard-working animal charity (5)
I believe the answer is:
oxfam
'charity' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for oxfam that I've seen before include "A famine-relief charity" , "Famine relief organisation" , "relief agency" , "Famine relief charity" , "Disaster-relief charity" .)