Old president overseeing pledge of intended code of chivalry (7)
I believe the answer is:
bushido
'code of chivalry' is the definition.
'bushido' can be an answer for 'code' (I have seen 'honourable code' mean 'bushido' so perhaps 'code' could also mean 'bushido'). I am unsure of the 'of chivalry' bit.
'old president overseeing pledge of intended' is the wordplay.
I cannot quite see how this works, but
'old' could be 'o' (common abbreviation eg in OE for Old English) and 'o' is found within the answer.
'president' could be 'bush' (George H W Bush or George W Bush) and 'bush' is present in the answer.
The remaining letters 'id' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for bushido that I've seen before include "honourable code" , "Feudal code of the Samurai" , "code of honour" , "Code of the Japense Samurai" , "Code for old military" .)