Surprisingly moral and creditable politician (7,8)
I believe the answer is:
liberal democrat
'politician' is the definition.
(the Liberal Democrats are a UK political party)
'surprisingly moral and creditable' is the wordplay.
'surprisingly' indicates an anagram (a surprising ordering of the letters).
'and' is a charade indicator (letters next to each other).
'moral'+'creditable'='moralcreditable'
'moralcreditable' with letters rearranged gives 'LIBERAL DEMOCRAT'.
(Other definitions for liberal democrat that I've seen before include "Party member" , "Cable, say" , "Politician" , "party person" .)