Theatrical fellow houses son in apartment (10)

I believe the answer is:

flamboyant

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'theatrical fellow houses son in apartment' is the definition.
I can't tell whether this definition defines the answer.

'theatrical fellow houses son in apartment' is the wordplay.
'theatrical fellow' becomes 'man' (fellow can mean a man. I am not sure about the 'theatrical' bit.).
'houses' indicates putting letters inside.
'son' becomes 'boy' (synonyms).
'in' indicates putting letters inside.
'apartment' becomes 'flat' (synonyms).
'man' enclosing 'boy' is 'mboyan'.
'mboyan' put inside 'flat' is 'FLAMBOYANT'.

Can you help me to learn more?

(Other definitions for flamboyant that I've seen before include "Showy" , "Ostentatious, colourful" , "baroque" , "Exuberant" , "Extravagant" .)

I've seen this clue in The Guardian.

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