Had board elected all the eccentric nobs at summit? (5)
I believe the answer is:
eaten
'had board' is the definition.
'eaten' can be an answer for 'had' (I've seen this in another clue). I'm not sure about the 'board' bit.
'elected all the eccentric nobs at summit?' is the wordplay.
'at summit?' says to take the initial letters (I've seen 'at summits' mean this (letters at the top of the words)).
The initial letters of 'elected all the eccentric nobs' is 'EATEN'.
Can you help me to learn more?
(Other definitions for eaten that I've seen before include "dined" , "What's taken in" , "demolished, possibly" , "worried" , "courses enjoyed?" .)