Near (5)
(Other definitions for close that I've seen before include "Near, mean or humid" , "stuffy" , "Heavy" , "nigh" , "Approaching - tight - finish" .)
(Other definitions for nigh that I've seen before include "comes close" , "All but one" , "Nearly" , "Near, as in archaic usage" , "Nearby" .)
'near' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for close to that I've seen before include "near" , "'Nearby (5,2)'" , "Nearly" .)
'near' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for close by that I've seen before include "Near at hand" , "just round the corner" .)