The others showered in a discreet manner (10)
I believe the answer is:
restrained
'in a discreet manner' is the definition.
I can't judge whether this defines the answer.
'the others showered' is the wordplay.
'the others' becomes 'rest' (eg the rest of a group).
'showered' becomes 'rained' (showers of rain).
'rest'+'rained'='RESTRAINED'
Can you help me to learn more?
(Other definitions for restrained that I've seen before include "Checked" , "Deprived of freedom" , "Held back" , "Calm" , "Reserved, dispassionate" .)