Hungriest to change? Absolutely (4,5)
I believe the answer is:
sure thing
'absolutely' is the definition.
(thesaurus)
'hungriest to change?' is the wordplay.
'to change?' indicates anagramming the letters (I've seen 'to change' mean this).
'hungriest' with letters rearranged gives 'SURE THING'.
(Other definitions for sure thing that I've seen before include "cert" , "A certainty - I agree!" , "no chance of losing" , "of course" .)