Don’t mess with first two characters variously interrupting reception (5,2)
I believe the answer is:
leave be
'variously interrupting reception' is the definition.
I know nothing about this answer so I can't judge whether this works.
'don't mess with first two characters' is the wordplay.
'two characters' means two replacements for 'character'.
'don't mess with' becomes 'leave' (I am not sure about this - if you are sure you should believe this answer much more).
'first' means one lot of letters go next to another.
'character' becomes 'b'.
'character' becomes 'e'.
'leave'+'b'+'e'='LEAVE BE'
Can you help me to learn more?
(Other definitions for leave be that I've seen before include "Let remain undisturbed" , "Refrain from disturbing (someone)" .)