The more developed one, sir? (6)
I believe the answer is:
senior
'the more developed one sir?' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'developed one sir?' is the wordplay.
'developed' indicates an anagram.
'one'+'sir'='onesir'
'onesir' is an anagram of 'SENIOR'.
Can you help me to learn more?
(Other definitions for senior that I've seen before include "Older in years or higher in rank" , "Elder person - higher in rank" , "'Older, superior (6)'" , "Pupil in a higher form" , "More advanced in years or authority" .)