Regularly one is moved to take in paper (5)
I believe the answer is:
often
'regularly' is the definition.
(often means regularly or frequently)
'one is moved to take in paper' is the wordplay.
'is moved' is an anagram indicator.
'to take in' means one lot of letters goes inside another.
'paper' becomes 'FT' (newspaper the FT, Financial Times).
'one' with letters rearranged gives 'oen'.
'oen' enclosing 'ft' is 'OFTEN'.
(Other definitions for often that I've seen before include "A lot" , "occurring with frequency" , "Quite frequently" , "Frequently, at short intervals" , "Frequent" .)