Sibling about to get upset stomach, mostly from vegetable (8)
I believe the answer is:
broccoli
'vegetable' is the definition.
(I know that Broccoli is a type of vegetable)
'sibling about to get upset stomach mostly from' is the wordplay.
I cannot quite see how this works, but
'sibling' could be 'bro' (I've seen this before) and 'bro' is found in the answer.
'about' could be 'c' (abbreviation for circa) and 'c' is found within the answer.
'from' could be 'o' (I've seen this in other clues) and 'o' is present in the answer.
The remaining letters 'cli' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for broccoli that I've seen before include "Vegetable with tightly packed green or purple flower heads" , "Vegetable in a strange cool crib" , "Vegetable whose Italian name means 'sprouts'" , "Vegetable with tight green flower heads" , "Green/purplish vegetable" .)