Mexican salamander (7)
I believe the answer is:
axolotl
'mexican salamander' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for axolotl that I've seen before include "Mexican native" , "Type of salamander" , "amphibian" , "Mexican salamander - allot ox (anag)" , "Central American salamander - lax tool (anag)" .)