Right by snake, another wild creature (4)
I believe the answer is:
boar
'wild creature' is the definition.
(wild pig)
'right by snake' is the wordplay.
'right' becomes 'r' (common abbreviation).
'by' says to put letters next to each other.
'snake' becomes 'boa' (boa is a kind of snake).
'r' after 'boa' is 'BOAR'.
'another' is the link.
I am not very happy about this link. It may be part of another bit of the clue.
(Other definitions for boar that I've seen before include "Sow's mate" , "A wild male pig" , "Male swine" , "Wild swine" , "Uncastrated male hog" .)