Reported emblem that clashes with another in band ... (6)
I believe the answer is:
cymbal
'that clashes with another in band' is the definition.
I can't tell whether this definition defines the answer.
'reported emblem' is the wordplay.
'reported' indicates a 'sounds like' (homophone) clue.
'emblem' becomes 'symbol' (I've seen this before).
'symbol' is a homophone of 'CYMBAL'.
Can you help me to learn more?
(Other definitions for cymbal that I've seen before include "clashing instrument" , "Percussion instrument like brass plate" , "One of a pair of percussion instruments" , "Percussionist's disc" , "Crashing instrument" .)