Rib's hot — somewhere to eat it outside? (5)
I believe the answer is:
chaff
'rib's' is the definition.
(thesaurus)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for chaff that I've seen before include "Husks - jokes" , "shells" , "fodder" , "Light banter - husks from corn" , "Refuse from threshing" .)