Infamy? No politician accepts that is ultimately pleasant (9)
I believe the answer is:
notoriety
'infamy?' is the definition.
(I know that notoriety is a type of infamy)
'no politician accepts that is ultimately pleasant' is the wordplay.
'politician' becomes 'tory' (term for a Conservative Party politician).
'accepts' is an insertion indicator.
'that is' becomes 'ie' (abbreviation for id est, 'that is' in Latin).
'ultimately' says to take the final letters.
The last letter of 'pleasant' is 't'.
'ie'+'t'='iet'
'tory' going around 'iet' is 'toriety'.
'no'+'toriety'='NOTORIETY'
(Other definitions for notoriety that I've seen before include "Bad publicity" , "Dishonour" , "Bad reputation" , "Fame from bad deeds" , "State of being infamous" .)