Harassment from newspapers almost certain (8)
I believe the answer is:
pressure
'harassment' is the definition.
(putting pressure on someone could be harassment)
'newspapers almost certain' is the wordplay.
'newspapers' becomes 'press' (the press is the newspaper industry).
'almost' means to remove the first letter.
'certain' becomes 'sure' (synonyms).
'sure' with its initial letter taken off is 'ure'.
'press'+'ure'='PRESSURE'
'from' is the link.
(Other definitions for pressure that I've seen before include "Force measured in pascals" , "A force that compels" , "Force per unit area" , "Type of organised group which tries to influence politicians" , "tension" .)