Ben and Ray, terribly close (6)
I believe the answer is:
nearby
'close' is the definition.
(similar in meaning)
'ben and ray terribly' is the wordplay.
'and' says to put letters next to each other.
'terribly' is an anagram indicator.
'ben' put after 'ray' is 'rayben'.
'rayben' anagrammed gives 'NEARBY'.
(Other definitions for nearby that I've seen before include "in the neighbourhood" , "A short distance away" , "[OPPOSITE OF] miles away" , "Locally" , "Just round the corner?" .)