Grunge band unconvincing here at last shows bite (4)

I believe the answer is:

edge

'bite' is the definition.
(I've seen this before)

'grunge band unconvincing here at last' is the wordplay.
'at last' suggests the final letters.
The final letters of 'grunge band unconvincing here' are 'EDGE'.

'shows' acts as a link.

(Other definitions for edge that I've seen before include "Final line" , "Golden ingot" , "Skirt" , "incisiveness" , "Border; intense quality" .)

I've seen this clue in The Independent.

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