No rise for one of more advanced years (6)

I believe the answer is:

senior

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'one of more advanced years' is the definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?

'no rise' is the wordplay.
'no rise' can be anagrammed to 'SENIOR'.
Though, I am not sure how this is indicated.

'for' is the link.

Can you help me to learn more?

(Other definitions for senior that I've seen before include "Older in years or higher in rank" , "Higher in rank or age" , "Elder person - higher in rank" , "Elder (of two)" , "Being old" .)

I've seen this clue in The Irish News.

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