Say yes, the time has come round again for it (5)
I believe the answer is:
agree
'say yes' is the definition.
(I've seen this in another clue)
'time has come round again for it' is the wordplay.
'time' becomes 'age' (an age is a period of time).
'has' is an insertion indicator.
'come round again' becomes 'r' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'for' means one lot of letters go next to another.
'it' becomes 'e' ('e' can mean 'electronic' which is similar to 'IT').
'age' enclosing 'r' is 'agre'.
'agre'+'e'='AGREE'
'the' acts as a link.
Can you help me to learn more?
(Other definitions for agree that I've seen before include "Consent required" , "Concur - correspond" , "'Birds in their little nest . . . . .'" , "Enjoy view in common" , "Concur, coincide" .)