Species list ends with bear (5)
I believe the answer is:
stand
'bear' is the definition.
(I know that bear can be written as stand)
'species list ends with' is the wordplay.
'ends' indicates one should take the final letters.
'with' becomes 'and'.
The last letters of 'species list' are 'st'.
'st'+'and'='STAND'
(Other definitions for stand that I've seen before include "Watch and do nothing to help" , "stick" , "Support" , "partnership" , "Hold good < area for spectators < put up with" .)