Norm shreds vegetables (8)
I believe the answer is:
parsnips
'vegetables' is the definition.
(parsnip is a kind of vegetable)
'norm shreds' is the wordplay.
'norm' becomes 'par' (I've seen this before).
'shreds' becomes 'snips' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'par'+'snips'='PARSNIPS'
Can you help me to learn more?
(Other definitions for parsnips that I've seen before include "Snip spar, oddly, of the vegetables" , "Snip spar with the vegetable" , "part of the traditional 27 [DINNER]" , "Spin spar around the vegetables" , "Things growing in garden" .)