On many occasions newspaper stops one working (5)
I believe the answer is:
often
'on many occasions' is the definition.
(I've seen this before)
'newspaper stops one working' is the wordplay.
'newspaper' becomes 'FT' (Financial Times newspaper).
'stops' means one lot of letters goes inside another.
'working' is an anagram indicator.
'one' anagrammed gives 'oen'.
'ft' placed within 'oen' is 'OFTEN'.
(Other definitions for often that I've seen before include "Quite frequently" , "A great deal" , "on numerous occasions" , "Turn away" , "Multiply" .)