George displaying gold helmet piece for auction (9)
I believe the answer is:
autopilot
'george' is the definition.
(I've seen this before)
'gold helmet piece for auction' is the wordplay.
I cannot quite understand how this works, but
'gold' could be 'au' (Au is the chemical symbol for gold) and 'au' is located in the answer.
'piece' could be 'lot' (I have seen 'Piece of ground ' mean 'lot' so perhaps 'piece' could also mean 'lot') and 'lot' is located in the answer.
'for' could be 'to' (eg both can mean 'in the opinion of') and 'to' is found within the answer.
The remaining letters 'pi' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'displaying' acts as a link.
Can you help me to learn more?
(Other definitions for autopilot that I've seen before include "control bypassing human intervention" , "Robot flier?" , "requiring no help when stacking?" , "flight aid" , "George (sl.)" .)