Suppress for a time the files assembled about it (6)
I believe the answer is:
stifle
'suppress' is the definition.
(stifling is a kind of suppressing)
'time the files assembled about it' is the wordplay.
'time' becomes 't' (abbreviation).
'assembled' indicates an anagram.
'about it' is an insertion indicator (some letters go around or about others).
'files' with letters rearranged gives 'sifle'.
't' placed inside 'sifle' is 'STIFLE'.
'for a' is the link.
(Other definitions for stifle that I've seen before include "Repress - asphyxiate" , "Part of animal's leg" , "Have difficulty breathing" , "Suppress or suffocate" , "Smother, suffocate" .)