Tool found in ditch is electronic (6)
I believe the answer is:
Here is my best explanation:
'tool' is the definition.
(chisel is a kind of tool)
'in ditch is electronic' is the subsidiary indication.
'in' indicates the answer is hidden within the clue.
'chisel' is hidden in the letters of 'ditch is electronic'.
'found' is the link.
(Other definitions for chisel that I've seen before include "Cutting tool used with hammer", "Wood-shaping tool", "Carpenter's or mason's tool", "Hammered cutting tool", "Carpentry tool", "Wood, stone or metal-cutting tool", "Tool with a flat cutting edge", "Carpenter's tool for shaping wood", "Tool for shaping wood or metal" and "Sculptor's tool".)