Hard interrupting Italian novelist, editor reflected (6)
I believe the answer is:
echoed
'reflected' is the definition.
(echoes are reflected sounds)
'hard interrupting italian novelist editor' is the wordplay.
'hard' becomes 'h' (abbreviation used in pencil classifications).
'interrupting' is an insertion indicator.
'italian novelist' becomes 'eco' (I've seen this in another clue).
'editor' becomes 'ed' (abbreviation).
'h' inserted inside 'eco' is 'echo'.
'echo'+'ed'='ECHOED'
(Other definitions for echoed that I've seen before include "Rang" , "Repeated a sound" , "Resounded" , "Reverberated; repeated" , "said nothing original" .)