To dine after noon is convenient (4)
I believe the answer is:
neat
'convenient' is the definition.
Both the definition and answer are adjectives. Perhaps there's an association between them I don't understand?
'to dine after noon' is the wordplay.
'to dine' becomes 'eat' (I've seen this in another clue).
'after' says to put letters next to each other.
'noon' becomes 'n' ().
'eat' after 'n' is 'NEAT'.
'is' is the link.
Can you help me to learn more?
(Other definitions for neat that I've seen before include "Steer - straight - trim" , "Spick and span" , "Orderly, uncluttered" , "descendant of 19 [AUROCHS]" , "Tidy, well-ordered" .)