Automated machine fabricated with carbon and aluminium (10)
I believe the answer is:
mechanical
'automated' is the definition.
(thesaurus)
'machine fabricated with carbon and aluminium' is the wordplay.
'fabricated with' is an anagram indicator.
'carbon' becomes 'c' (C is the chemical symbol for carbon).
'and' means one lot of letters go next to another.
'aluminium' becomes 'al' (Al is the chemical symbol for aluminium).
'machine' mixed up with 'c' makes 'mechanic'.
'mechanic'+'al'='MECHANICAL'
(Other definitions for mechanical that I've seen before include "Bottom perhaps" , "Robotic" , "Lacking thought or spontaneity" , "Machine-like" , "Automatic" .)