More mature (5)
'more mature' is the definition.
('old' is associated in meaning with 'mature')
This is all the clue.
(Other definitions for older that I've seen before include "More advanced in point of time" , "as we all will be tomorrow" , "Advanced in years (but wiser?)" , "Less young" , "Elder" .)
'more mature' is the definition.
('ripe' can be similar in meaning to 'mature')
This is the entire clue.
(Other definitions for riper that I've seen before include "More prepared" , "(Of fruit) more mature" , "On the way to getting mellow" , "More ready for picking" , "Developed further" .)