Celebrity very averse ultimately to go hungry (6)
I believe the answer is:
starve
'go hungry' is the definition.
(to starve is to go without food)
'celebrity very averse ultimately' is the wordplay.
'celebrity' becomes 'star' (a star is a celebrity or famous person).
'very' becomes 'v' (abbreviation).
'ultimately' indicates one should take the final letters.
The final letter of 'averse' is 'e'.
'star'+'v'+'e'='STARVE'
'to' is the link.
(Other definitions for starve that I've seen before include "Vaster (anag)" , "Go hungry" , "Suffer great hunger" , "Deprive of food" , "Suffer from want of food" .)