French engineer with life revolving around iron (6)
I believe the answer is:
eiffel
'french engineer' is the definition.
(Gustave Eiffel, as in the Eiffel Tower)
'life revolving around iron' is the wordplay.
'revolving' is an anagram indicator (letters turning or twisting around).
'around' indicates putting letters inside.
'iron' becomes 'Fe' (Fe is the chemical symbol for iron).
'life' with letters rearranged gives 'eifl'.
'eifl' enclosing 'fe' is 'EIFFEL'.
'with' acts as a link.
(Other definitions for eiffel that I've seen before include "& 20 Across Paris landmark" , "Parisian tower builder" , "French designer" , "Creator of a Paris landmark, built in 1889" , "French tower-designer" .)