Bond welcomes brilliant rant (6)
I believe the answer is:
tirade
'rant' is the definition.
(both can mean an angry outburst)
'bond welcomes brilliant' is the wordplay.
'bond' becomes 'tie' (both can mean a connection).
'welcomes' means one lot of letters goes inside another (in sense of 'invites in').
'brilliant' becomes 'rad' (I am not sure about this - if you are sure you should believe this answer much more).
'tie' placed around 'rad' is 'TIRADE'.
Can you help me to learn more?
(Other definitions for tirade that I've seen before include "A prolonged outburst of angry words" , "Vocal abuse" , "A prolonged outburst of abuse" , "Verbal onslaught" , "Long angry harangue" .)