Understand about the inn being exceptional for eating (6)
I believe the answer is:
dining
'for eating' is the definition.
(dining is a kind of eating)
'understand about the inn being exceptional' is the wordplay.
'understand' becomes 'dig' (digging is a kind of understanding).
'about' indicates putting letters inside.
'being exceptional' is an anagram indicator (an unusual or exceptional ordering of the letters).
'inn' with letters rearranged gives 'nin'.
'dig' enclosing 'nin' is 'DINING'.
(Other definitions for dining that I've seen before include "Eating the evening meal" , "Type of room, car, table" , "at lunch?" , "Making a meal of" , "This room is for eating in" .)