Use following way of working with a computer device (5)
I believe the answer is:
mouse
'a computer device' is the definition.
(a computer mouse)
'use following way of working' is the wordplay.
'following' means one lot of letters go next to another.
'way of working' becomes 'mo' (modus operandi).
'use' put after 'mo' is 'MOUSE'.
'with' acts as a link.
(Other definitions for mouse that I've seen before include "Shy individual" , "Mickey or Minnie?" , "Squeaky creature" , "Tiny creature" , "Small creature" .)