Grunge band playing here at last shows bite (4)
I believe the answer is:
edge
'bite' is the definition.
(I've seen this in another clue)
'grunge band playing here at last' is the wordplay.
'at last' indicates one should take the final letters.
The final letters of 'grunge band playing here' are 'EDGE'.
'shows' is the link.
(Other definitions for edge that I've seen before include "on which one is ill at ease?" , "'Margin, rim (4)'" , "Rim or slight advantage" , "Hem" , "Brink or border" .)