King enters to provide food bowl (6)
I believe the answer is:
crater
'bowl' is the definition.
(thesaurus)
'king enters to provide food' is the wordplay.
'king' becomes 'R' (abbreviation for rex, king in Latin).
'enters' indicates putting letters inside.
'to provide food' becomes 'cater' (I've seen this before).
'r' inserted into 'cater' is 'CRATER'.
(Other definitions for crater that I've seen before include "Bowl-shaped cavity, in a volcano say" , "Feature visible on the moon" , "Fissure in the earth's crust" , "big hole" , "Volcano's mouth" .)