Perhaps the lorry left paper off (7)
I believe the answer is:
article
'perhaps the' is the definition.
('the' is the definite article)
'lorry left paper off' is the wordplay.
'lorry' becomes 'artic' (articulated lorry is a semi-trailer truck).
'paper' becomes 'FT' (Financial Times newspaper).
'off' is a deletion indicator.
'left' with 'ft' taken out is 'le'.
'artic'+'le'='ARTICLE'
(Other definitions for article that I've seen before include "Rile cat (anag.)" , "Division" , "'The', definitely" , "Newspaper essay" , "Thing - composition - item" .)