Barney may be close at hand (6)
I believe the answer is:
nearby
'close at hand' is the definition.
(I've seen this before)
'barney may be' is the wordplay.
'may be' is an anagram indicator.
'barney' is an anagram of 'NEARBY'.
(Other definitions for nearby that I've seen before include "A short distance away" , "in the neighbourhood" , "Around the corner" , "In the vicinity" , "In close proximity" .)