Well-informed and capable of engagement (2-2-4)
I believe the answer is:
up-to-date
'well-informed' is the definition.
Both the definition and answer are adjectives. Perhaps you can see a link between them that I don't see?
'capable of engagement' is the wordplay.
I cannot really understand how this works, but
'capable' could be 'upto' (synonyms) and 'upto' is found within the answer.
'engagement' could be 'date' (synonyms) and 'date' is found in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'and' acts as a link.
Can you help me to learn more?
(Other definitions for up-to-date that I've seen before include "To the present time" , "Current, right to this day" , "Containing all the latest information" , "Following modern trends" , "Incorporating the latest developments and trends" .)