Bow tie grabbed by Labour supporter? Infamy! (9)
I believe the answer is:
notoriety
'infamy' is the definition.
(notoriety is a kind of infamy)
'bow tie grabbed by labour supporter?' is the wordplay.
I cannot really see how this works, but
an anagram of 'tie' is 'iet' which is within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for notoriety that I've seen before include "Fame from bad deeds" , "Infamy, disrepute" , "State of being well known, negatively" , "Ill fame" , "Bad publicity" .)