New European editor repeatedly called for (6)
I believe the answer is:
needed
'called for' is the definition.
('need' can be a synonym of 'call for')
'new european editor repeatedly' is the wordplay.
'new' becomes 'n' (common abbreviation eg NT for New Testament).
'european' becomes 'e' (abbreviation e.g. EU).
'editor' becomes 'ed' (abbreviation).
'repeatedly' indicates the doubling of some letters.
'ed' doubled is 'eded'.
'n'+'e'+'eded'='NEEDED'
(Other definitions for needed that I've seen before include "'Lacked, required (6)'" , "'Wanted, required (6)'" , "Required something essential" , "Required, necessary" , "Lacked something essential" .)