Odd root vegetable for Alec Rice (8)
I believe the answer is:
celeriac
'odd root vegetable for alec rice' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for celeriac that I've seen before include "Plant with a turnip-like 1 down" , "Turnip-rooted celery" , "Plant with turnip-like root" , "Edible root of a variety of celery plant" , "Clear ice (anag) - it is used as a vegetable" .)