Crossword Genius

Rocket-maker inserted layer into adopted child (10)

Ross

I believe the answer is:

stephenson

I'm a little stuck... Click here to teach me more about this clue!

'rocket-maker inserted' is the definition.
I can't tell whether this definition defines the answer.

'layer into adopted child' is the wordplay.
'layer' becomes 'hen' (hens lay eggs).
'into' is an insertion indicator.
'adopted child' becomes 'stepson' (stepson is a kind of child. I am not sure about the 'adopted' bit.).
'hen' placed into 'stepson' is 'STEPHENSON'.

Can you help me to learn more?

(Other definitions for stephenson that I've seen before include "Loco engineer" , "Rocket engineer" , "George --, rail pioneer" , "Loco inventor" , "Train man" .)

I've seen this clue in the Sydney Morning Herald.
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