Disguise the nature of surrounding Zulu country (6)
I believe the answer is:
belize
'country' is the definition.
(Belize is an example)
'disguise the nature of surrounding zulu' is the wordplay.
'disguise the nature of' becomes 'belie' (to belie is to misrepresent or disguise).
'surrounding' indicates putting letters inside.
'zulu' becomes 'Z' (phonetic alphabet: alpha, bravo, charlie etc.).
'belie' going around 'z' is 'BELIZE'.
(Other definitions for belize that I've seen before include "Caribbean country" , "Commonwealth state" , "Central American country, formerly British Honduras" , "Central American state" , "Central American republic" .)