Storyteller maintains Zulu finally defeated saurian (6)
I believe the answer is:
lizard
'saurian' is the definition.
(lizard is a kind of saurian)
'storyteller maintains zulu finally defeated' is the wordplay.
'storyteller' becomes 'liar' (someone telling lies).
'maintains' indicates putting letters inside.
'zulu' becomes 'Z' (phonetic alphabet: alpha, bravo, charlie etc.).
'finally' says to take the final letters.
The final letter of 'defeated' is 'd'.
'liar' going around 'z' is 'lizar'.
'lizar'+'d'='LIZARD'
(Other definitions for lizard that I've seen before include "Kind of reptile - chameleon is one" , "The most Southerly point of England" , "part of Cornish coast" , "Reptile such as skink" , "Four-legged reptile" .)