No rise can be arranged for the one at the top (6)
I believe the answer is:
senior
'the one at the top' is the definition.
I can't judge whether this defines the answer.
'no rise can be arranged' is the wordplay.
'can be arranged' indicates anagramming the letters.
'no'+'rise'='norise'
'norise' with letters rearranged gives 'SENIOR'.
'for' is the link.
Can you help me to learn more?
(Other definitions for senior that I've seen before include "Elder person - higher in rank" , "High in rank" , "Higher in rank or authority" , "Older in years or higher in rank" , "Superior - elder" .)