Vignette, proper text occasionally read (9)
I believe the answer is:
'read' is the definition.
(I know that read can be written as interpret)
'vignette proper text occasionally' is the wordplay.
'occasionally' indicates alternate letters.
The alternating letters of 'vignettepropertext' are 'INTERPRET'.
(Other definitions for interpret that I've seen before include "Read" , "Translate into another language" , "Explain the meaning of - another language?" , "Assign one's own meaning to" , "Translate, make sense of" .)