Understand about the inn being unusual 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 unusual' is the wordplay.
'understand' becomes 'dig' (digging is a kind of understanding).
'about' indicates putting letters inside.
'being unusual' is an anagram indicator.
'inn' is an anagram of 'nin'.
'dig' going around 'nin' is 'DINING'.
(Other definitions for dining that I've seen before include "Eating at table" , "Type of room, car, table" , "At table perhaps" , "Supping" , "Making a meal of" .)