Operating daily? In theory (2,5)
I believe the answer is:
on paper
'in theory' is the definition.
('on paper' can be a synonym of 'in theory')
'operating daily?' is the wordplay.
'operating' becomes 'on' (I've seen this in other clues).
'daily?' becomes 'paper' (newspaper).
'on'+'paper'='ON PAPER'
(Other definitions for on paper that I've seen before include "As written - in theory" , "Where Times staff work" , "Theoretically" , "Planned (in theory)" , "Hypothetically" .)