Prospect of travel document consuming time (5)
I believe the answer is:
vista
'prospect' is the definition.
('vista' can be a synonym of 'prospect')
'travel document consuming time' is the wordplay.
'travel document' becomes 'visa' (I've seen this before).
'consuming' indicates putting letters inside.
'time' becomes 't'.
'visa' enclosing 't' is 'VISTA'.
'of' acts as a link.
(Other definitions for vista that I've seen before include "Pleasing view" , "Broad prospect" , "Panoramic scene" , "Distant view" , "Panorama" .)