Tory admits to endlessly ponder over newspaper article (6)
I believe the answer is:
column
'newspaper article' is the definition.
(I've seen this before)
'tory admits to endlessly ponder over' is the wordplay.
'tory' becomes 'con' (I've seen this before**).
'admits' means one lot of letters goes inside another.
'to endlessly' means to remove the last letter.
'ponder' becomes 'mull' ('mull' can be a synonym of 'ponder').
'over' is a reversal indicator.
'mull' with its last letter taken off is 'mul'.
'mul' reversed gives 'lum'.
'con' enclosing 'lum' is 'COLUMN'.
(Other definitions for column that I've seen before include "Round pillar or newspaper article" , "Pilaster" , "Newspaper division" , "Tower" , "one in Trafalgar?" .)