One repeatedly interrupts Australian band, generating sharp response? (6)
I believe the answer is:
acidic
'one repeatedly interrupts australian band' is the definition.
I can't tell whether this defines the answer.
'sharp response?' is the wordplay.
'sharp' becomes 'acid' (as in sharp-tasting).
'response?' becomes 'ic' (I can't explain this - if you can you should give a lot more credence to this answer).
'acid'+'ic'='ACIDIC'
'generating' is the link.
Can you help me to learn more?
(Other definitions for acidic that I've seen before include "Tart, sour" , "Containing a sour-tasting substance" , "Tasting sharp or sour" , "scathing?" , "that leaves a bitter taste" .)