Husband getting in metal flying machine (7)
I believe the answer is:
chopper
'flying machine' is the definition.
(term for a helicopter)
'husband getting in metal' is the wordplay.
'husband getting' becomes 'h' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'in' means one lot of letters goes inside another.
'metal' becomes 'copper' (copper is a kind of metal).
'h' going within 'copper' is 'CHOPPER'.
Can you help me to learn more?
(Other definitions for chopper that I've seen before include "Air transport" , "Hatchet" , "Lizzie Borden" , "type of aircraft" , "that's used by a lumberjack" .)