Showering after short time working out? (8)
I believe the answer is:
training
'working out?' is the definition.
(training is a kind of working out)
'showering after short time' is the wordplay.
'showering' becomes 'raining' (I've seen this before).
'after' says to put letters next to each other.
'short time' becomes 't' (abbreviation for time).
'raining' put after 't' is 'TRAINING'.
(Other definitions for training that I've seen before include "in practice" , "Tuition" , "Working out" , "Process of education" , "Doing exercises" .)