Case dismissed by one dressed in leather? (10)

I believe the answer is:
outpatient
'case dismissed by one dressed in leather?' is the definition.
'outpatient' can be an answer for 'case' (thesaurus). I'm not certain of the 'dismissed by one dressed in leather?' bit.
'case dismissed by' is the wordplay.
'case' becomes 'patient' (a medical case).
'dismissed' becomes 'out' (dismissed in cricket).
'by' is a charade indicator (letters next to each other).
'patient' put after 'out' is 'OUTPATIENT'.
Can you help me to learn more?
(Other definitions for outpatient that I've seen before include "One treated without being admitted to hospital" , "Non-resident hospital user" , "Hospital visitor" , "one needs treatment" , "One not occupying hospital bed" .)
