Encouragement to no good end? (3)

I believe the answer is:
nod
'encouragement' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'no good end?' is the wordplay.
'end?' suggests the final letters (I've seen 'ending' mean this (the ending of the word)).
The last letter of 'good' is 'd'.
'no'+'d'='NOD'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for nod that I've seen before include "Go to sleep in this land" , "Indicate assent or recognition" , "Gesture of assent" , "Indicate agreement (or sleepiness!)" , "Signal assent" .)
