Refuse to grant right to throw out (6)
I believe the answer is:
reject
'refuse' is the definition.
(I know that refuse can be written as reject)
'right to throw out' is the wordplay.
'right' becomes 'r' (common abbreviation).
'to throw out' becomes 'eject' ('eject' can be a synonym of 'throw out').
'r'+'eject'='REJECT'
'to grant' is the link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for reject that I've seen before include "Refuse to accept or react against" , "Refuse to accept, spurn" , "Refuse to accept or acknowledge" , "Turn (offer) down" , "Refuse to consider (something)" .)