Rich duke wears spectacles after springtime? (4-2-2)
I believe the answer is:
well-to-do
'rich' is the definition.
(I know that rich can be written as well-to-do)
'duke wears spectacles after springtime?' is the wordplay.
I cannot really understand how this works, but
'duke' could be 'd' (abbreviation) and 'd' is found in the answer.
'spectacles' could be 'oo' (I've seen this in other clues) and 'oo' is found in the remaining letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for well-to-do that I've seen before include "Comfortably off" , "Fairly rich, prosperous" , "Quite wealthy" , "Moderately wealthy" , "with a lot of funds" .)