Show willing (3)
I believe the answer is:
nod
This clue could be a double definition.
'show' is the first definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'willing' is the second definition.
The answer and definition can be both acts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
Can you help me to learn more?
(Other definitions for nod that I've seen before include "Tacit agreement" , "The Land of ... lay east of Eden" , "Indicate 25 [YES]" , "Green light" , "Indicate assent with head movement" .)