Figure of Zulu surrounded by rampaging emu and tapir (9)
I believe the answer is:
trapezium
'figure' is the definition.
(trapezium is a kind of figure)
'zulu surrounded by rampaging emu and tapir' is the wordplay.
'zulu' becomes 'z' (phonetic alphabet: alpha, bravo, charlie etc.).
'surrounded by' means one lot of letters goes inside another.
'rampaging' indicates an anagram (I've seen this in other clues).
'and' means one lot of letters go next to another (I've seen this in other clues).
'emu' after 'tapir' is 'tapiremu'.
'tapiremu' anagrammed gives 'trapeium'.
'z' inserted within 'trapeium' is 'TRAPEZIUM'.
'of' acts as a link.
(Other definitions for trapezium that I've seen before include "Carpal bone" , "Certainly no square" , "Quadrilateral - small wrist bone" , "Geometric shape" , "Quadrilateral with pairs of unequal parallel sides" .)