In party, starving king gets some tough glass (5)
I believe the answer is:
pyrex
'glass' is the definition.
(Pyrex is an example)
'in party starving king gets some tough' is the wordplay.
I cannot quite understand how this works, but
'king' could be 'rex' ('king' in Latin) and 'rex' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for pyrex that I've seen before include "Heatproof glass" , "Heat-resistant glass" , "Heat-resistant glassware used in cooking" , "Heat-proof ovenware" .)