Constant interference? (6)
I believe the answer is:
static
This clue is a double definition.
'constant' is the first definition.
(I've seen this in another clue)
'interference?' is the second definition.
(I know that static is a type of interference)
(Other definitions for static that I've seen before include "stable" , "Not active or moving" , "Inert, motionless" , "Changeless" , "Still, not moving" .)