Lizard King mural -- neat, but odd bits missing (6)
I believe the answer is:
iguana
'lizard' is the definition.
(I know that iguana is a type of iguanid)
'king mural neat but odd bits missing' is the wordplay.
'but odd bits missing' indicates alternate letters (letters in odd-numbered positions removed).
'king'+'mural'+'neat'='kingmuralneat'
The alternating letters of 'kingmuralneat' are 'IGUANA'.
(Other definitions for iguana that I've seen before include "Arboreal lizard of S America" , "Large lizard found in Guiana" , "Tropical spiny lizard" , "Large tree-climbing specimen of 5 down in tropical America" , "Large crested lizard" .)