Show ill-natured uprising in Bury endlessly (8)
I believe the answer is:
indicate
'show' is the definition.
('indicate' can be a synonym of 'show')
'ill-natured uprising in bury endlessly' is the wordplay.
'ill-natured' becomes 'acid'.
'uprising' says the letters should be written backwards.
'in' is an insertion indicator.
'bury' becomes 'inter' (I've seen this before).
'endlessly' means to remove the last letter.
'acid' in reverse letter order is 'dica'.
'inter' with its final letter taken off is 'inte'.
'dica' going within 'inte' is 'INDICATE'.
(Other definitions for indicate that I've seen before include "Point out or give some notion of" , "Point out, make known" , "Point, show, signal" , "Make a signal" , "(Give a) signal" .)