Inclined to give agreement (6)
I believe the answer is:
nodded
'agreement' is the definition.
(I have seen 'Signified agreement' mean 'nodded' so perhaps 'agreement' could also mean 'nodded')
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for nodded that I've seen before include "Agreed - dropped off" , "Indicated assent or recognition" , "Signalled assent" , "Gave silent assent with head movement" , "Let the head drop" .)