Doctor Braille, then married, embodying one's belief (10)

'belief' is the definition.
(liberalism is a political ideology)

'doctor braille then married embodying one's' is the wordplay.
'doctor' is an anagram indicator.
'then' says to put letters next to each other.
'married' becomes 'm'.
'embodying' means one lot of letters goes inside another (to embody can mean to contain or include).
'one's' becomes 'i's' (Roman numeral).
'braille'+'m'='braillem'
'braillem' is an anagram of 'liberalm'.
'liberalm' going around 'is' is 'LIBERALISM'.