Fasten article in short time (6)
I believe the answer is:
tether
'fasten' is the definition.
(I've seen this before)
'article in short time' is the wordplay.
'article' becomes 'the' (the definite article in English).
'in' is an insertion indicator.
'short time' becomes 'ter' (I can't explain this - if you can you should give a lot more credence to this answer).
'the' inserted inside 'ter' is 'TETHER'.
(Other definitions for tether that I've seen before include "lead" , "Rope to secure animal" , "moor" , "Rope; the exasperated at the end of it" , "Halter" .)