Able to move having discovered files supporting disorderly crowd (6)
I believe the answer is:
mobile
'able to move' is the definition.
(mobile means able to move around)
'discovered files supporting disorderly crowd' is the wordplay.
'discovered' means to look at the middle letters (dis-covered - outer letters removed).
'supporting' says to put letters next to each other (in a down clue, some letters go below others).
'disorderly crowd' becomes 'mob' (I've seen this before).
The middle of 'files' is 'ile'.
'ile' put after 'mob' is 'MOBILE'.
'having' acts as a link.
(Other definitions for mobile that I've seen before include "locomotive" , "Telephone" , "Movable, phone say" , "See 17" , "Able to move freely" .)