Point of order? That could be unpolitic (9)
I believe the answer is:
punctilio
'point of order?' is the definition.
(a punctilio is a petty or minor point)
'could be unpolitic' is the wordplay.
'could be' indicates anagramming the letters.
'unpolitic' with letters rearranged gives 'PUNCTILIO'.
'that' acts as a link.
(Other definitions for punctilio that I've seen before include "Observance of etiquette" , "Fine distinction" , "Ceremonious points of etiquette" , "what strict etiquette demands" , "Fine point" .)