Time for fool to have his day (5)
I believe the answer is:
april
'time' is the definition.
(I've seen this before)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for april that I've seen before include "Month of showers and of the Queen's birthday" , "'All in an ... evening' (Katharine Tynan)" , "Spring month" , "Calendar month" , "Springtime rain" .)