Yet he stands at the head of the board (8)
I believe the answer is:
chairman
'the head of the board' is the definition.
(I've seen this before)
'yet he' is the wordplay.
'yet' becomes 'chair' (I am not sure about this - if you are sure you should believe this answer much more).
'he' becomes 'man' (I've seen this in another clue).
'chair'+'man'='CHAIRMAN'
'stands at' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for chairman that I've seen before include "Presiding male at meetings" , "official in authority" , "Committee, club, head" , "Mao?" , "Person in charge" .)