Educate shower after time (5)
I believe the answer is:
train
'educate' is the definition.
(I know that educate can be written as train)
'shower after time' is the wordplay.
'shower' becomes 'rain' (synonyms).
'after' says to put letters next to each other.
'time' becomes 't' (abbreviation).
'rain' put after 't' is 'TRAIN'.
(Other definitions for train that I've seen before include "Form of transport" , "union's lengthy item" , "Following" , "Series of gears; retinue" , "School, educate" .)