Nobody late - it will happen eventually (3,2,4,4)
I believe the answer is:
all in good time
'eventually' is the definition.
(I've seen this before)
'nobody late it will happen' is the wordplay.
I cannot quite see how this works, but
'late' could be 'd' and 'd' is located in the answer.
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is present in the answer.
'will' could be 'll' (contracted form, as in 'he'll' - 'he will') and 'll' is found in the answer.
'happen' could be 'go' (going is a kind of happening) and 'go' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for all in good time that I've seen before include "nobody is late" , "Not until the right moment" , "Ultimately" , "No sooner than is appropriate" , "No need to rush" .)