Two animals making tungsten (7)
I believe the answer is:
wolfram
'tungsten' is the definition.
(synonyms)
'two animals' is the wordplay.
'two animals' can mean two substitutions for 'animal'.
'animal' becomes 'wolf' (I have seen 'Predatory animal' mean 'wolf' so perhaps 'animal' could also mean 'wolf').
'animal' becomes 'ram' (male sheep).
'wolf'+'ram'='WOLFRAM'
'making' acts as a link.
(Other definitions for wolfram that I've seen before include "Heavy metal" , "elemental" , "greyish-white metal" , "Element by another name" , "at no 74, originally" .)