Spreading dirt during weak commentary (8)
I believe the answer is:
punditry
'commentary' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'spreading dirt during weak' is the wordplay.
'spreading' is an anagram indicator.
'during' indicates putting letters inside.
'weak' becomes 'puny' (similar in meaning).
'dirt' with letters rearranged gives 'ditr'.
'ditr' inserted within 'puny' is 'PUNDITRY'.
Can you help me to learn more?
(Other definitions for punditry that I've seen before include "display of expertise" , "expert opinion" , "The ability to speak authoritatively on a subject" , "The giving of expert opinions" .)