Suffering mother keeps bohemian on road (9)
I believe the answer is:
martyrdom
'suffering' is the definition.
(martyrdom is suffering for a higher cause)
'mother keeps bohemian on road' is the wordplay.
'mother' becomes 'mom' (mom is a kind of mother).
'keeps' is an insertion indicator (inserted letters are kept inside).
'bohemian' becomes 'arty' (bohemian can mean arty or creative).
'on' means one lot of letters go next to another.
'road' becomes 'rd' (abbreviation).
'arty'+'rd'='artyrd'
'mom' going around 'artyrd' is 'MARTYRDOM'.
(Other definitions for martyrdom that I've seen before include "suffering" , "Death for one's beliefs" , "Death of one dying for their religion" .)