Might make one queasy to see a tuna being chopped up (8)
I believe the answer is:
nauseate
'might make one queasy' is the definition.
I can't tell whether this defines the answer.
'see a tuna being chopped up' is the wordplay.
'being chopped up' is an anagram indicator.
'see'+'a'+'tuna'='seeatuna'
'seeatuna' is an anagram of 'NAUSEATE'.
'to' is the link.
Can you help me to learn more?
(Other definitions for nauseate that I've seen before include "Make to feel imminent sickness, turn stomach" , "Make to feel sick, revolt" , "Sicken" , "Cause sick or disgusted feeling" , "Make to feel sick, or disgust" .)