Cold shower in this nowadays (4)
I believe the answer is:
snow
'cold shower' is the definition.
(I've seen this in another clue)
'in this nowadays' is the wordplay.
'in' indicates a hidden word.
'SNOW' can be found hidden inside 'this nowadays'.
(Other definitions for snow that I've seen before include "Ice crystal precipitation" , "TV newsman" , "Flakes overhead" , "Wintry stuff" , "Winter precipitation a cocaine" .)