Eventually accept positive aspect of being punctual (2,4,4)
I believe the answer is:
in good time
'aspect of being punctual' is the definition.
I can't judge whether this definition defines the answer.
'eventually accept positive' is the wordplay.
'eventually' becomes 'intime' (synonyms).
'accept' is an insertion indicator.
'positive' becomes 'good' (similar in meaning).
'intime' enclosing 'good' is 'IN GOOD TIME'.
Can you help me to learn more?
(Other definitions for in good time that I've seen before include "How the drummer should play" , "Certainly not late" , "Quite early enough" , "Without risk of being late" , "Quickly" .)