It acts strangely causing interference perhaps (6)
I believe the answer is:
static
'it acts strangely causing interference perhaps' is the definition.
The definition suggests a singular noun which matches the answer.
'it acts strangely' is the wordplay.
'strangely' is an anagram indicator.
'it'+'acts'='itacts'
'itacts' is an anagram of 'STATIC'.
Can you help me to learn more?
(Other definitions for static that I've seen before include "8-ing - sort of electricity, line or memory" , "Unmoving, unchanging" , "Motionless like certain electricity" , "Still - crackling on the radio" , "Constant interference" .)