Members of panel can nip over to cover summit (8)
I believe the answer is:
pinnacle
'summit' is the definition.
(I know that pinnacle is a type of summit)
'members of panel can nip over' is the wordplay.
'members of panel' becomes 'el' (I am not sure about this - if you are sure you should believe this answer much more).
'over' shows that the letters should be reversed in order.
'el'+'can'+'nip'='elcannip'
'elcannip' in reverse letter order is 'PINNACLE'.
'to cover' acts as a link.
Can you help me to learn more?
(Other definitions for pinnacle that I've seen before include "The highest level" , "Crown" , "Culmination" , "High point of rock" , "tip-top" .)