Stop shower before time showing inhibition (9)
I believe the answer is:
restraint
'inhibition' is the definition.
(thesaurus)
'stop shower before time' is the wordplay.
'stop' becomes 'rest'.
'shower' becomes 'rain' (synonyms).
'before' is a charade indicator (letters next to each other).
'time' becomes 't' (abbreviation).
'rest'+'rain'+'t'='RESTRAINT'
'showing' acts as a link.
(Other definitions for restraint that I've seen before include "Limiting device" , "Check" , "Moderation" , "controlling influence" , "It keeps someone or something under control" .)