Prize what's of utility (5)
I believe the answer is:
value
This could be a double definition.
'prize' is the first definition.
(synonyms)
'of utility' is the second definition.
'value' can be an answer for 'utility' (I've seen this in another clue). I'm not certain of the 'of' bit.
'what's' is the link.
Can you help me to learn more?
(Other definitions for value that I've seen before include "Monetary worth" , "Hold in high regard" , "Consider to be important" , "Hold dear, regard highly" , "Importance, worth or usefulness" .)