Picture of small article in flight (8)
I believe the answer is:
seascape
'picture' is the definition.
(I know that seascape is a type of picture)
'small article in flight' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'article' becomes 'a' (the indefinite article in English).
'in' indicates putting letters inside.
'flight' becomes 'escape' (flight can mean an escape).
'a' put within 'escape' is 'eascape'.
's'+'eascape'='SEASCAPE'
'of' acts as a link.
(Other definitions for seascape that I've seen before include "Painting - pea cases (anag)" , "Painting, maybe a Turner" , "Painting genre" , "Coastal or ocean view" , "Marine view/picture" .)