Left heat out of machine (5)
I believe the answer is:
lathe
'machine' is the definition.
(machine for shaping metal etc)
'left heat out' is the wordplay.
'left' becomes 'l' (common abbreviation).
'out' is an anagram indicator (out can mean wrong or inaccurate).
'heat' with letters rearranged gives 'athe'.
'l'+'athe'='LATHE'
'of' acts as a link.
(Other definitions for lathe that I've seen before include "Machine for cutting, drilling or polishing" , "Means for turning" , "Machine for turning and shaping wood etc" , "Turner's machine" , "Wood-turning machine" .)