Nutritionist at uni says eating anchovy toppings could cause queasiness (6)
I believe the answer is:
nausea
'queasiness' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for nausea that I've seen before include "Feeling of imminent sickness, may be caused by sea" , "Squeamishness" , "Malady" , "Seasickness" , "Feeling of revulsion" .)