Old business paper, edition lacking content repeatedly (5)
I believe the answer is:
often
'repeatedly' is the definition.
(I've seen this before)
'old business paper edition lacking content' is the wordplay.
'old' becomes 'o' (abbreviation as in OT - Old Testament).
'business paper' becomes 'FT' (Financial Times newspaper).
'lacking content' suggests removing the centre (the content of the word is emptied out).
'edition' with its middle taken out is 'en'.
'o'+'ft'+'en'='OFTEN'
(Other definitions for often that I've seen before include "Quite frequently" , "occurring with frequency" , "Frequently, habitually" , "Frequently, not seldom" , "Commonly" .)