Bury a little kitten (tom, Burmese) (6)
I believe the answer is:
entomb
'bury' is the definition.
('entomb' can be a synonym of 'bury')
'a little kitten tom burmese' is the wordplay.
'a little' indicates a hidden word.
'ENTOMB' can be found hidden inside 'kitten tom burmese'.
(Other definitions for entomb that I've seen before include "Place in a sepulchre" , "dispose of the dead" , "Put in a grave" , "Bury, place in a crypt" , "Lay to rest in an underground vault" .)