Where suits might be heard ... or certain cases? (10)
I believe the answer is:
'certain cases?' is the definition.
(case can mean a doctor's patient)
'where suits might be heard' is the wordplay.
'where suits might be' becomes 'in Patience' (patience is a card game).
'heard' indicates a 'sounds like' (homophone) clue.
'inpatience' sounds like 'INPATIENTS'.
'or' acts as a link.