Nearest point in a cupboard (7)
I believe the answer is:
closest
'nearest' is the definition.
(synonyms)
'point in a cupboard' is the wordplay.
'point' becomes 'S' (South).
'in' indicates putting letters inside.
'a cupboard' becomes 'closet' (type of cupboard).
's' inserted into 'closet' is 'CLOSEST'.
(Other definitions for closest that I've seen before include "Nearest or meanest" , "Nearest or most sultry" , "Most stuffy" , "Most intimate" , "Most secretive" .)