Close and open narrow entrance around really big yard (6)
I believe the answer is:
nearby
'close' is the definition.
(similar in meaning)
'open narrow entrance around really big yard' is the wordplay.
'open' indicates taking the first letters (take the opening letter).
'yard' becomes 'y' (abbreviation).
The first letters of 'narrow entrance around really big' is 'nearb'.
'nearb'+'y'='NEARBY'
'and' is the link.
(Other definitions for nearby that I've seen before include "Barney (anag)" , "Around the corner" , "A short distance away" , "somewhere close" , "Just round the corner?" .)