Security measure: company’s installed genuine article (4,5)
I believe the answer is:
fire alarm
'security measure' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'company's installed genuine article' is the wordplay.
'company' becomes 'firm' (firm can mean a company or business).
'installed' indicates putting letters inside.
'genuine' becomes 'real' (similar in meaning).
'article' becomes 'a' (English indefinite article).
'real'+'a'='reala'
'firm' placed around 'reala' is 'FIRE-ALARM'.
Can you help me to learn more?
(Other definitions for fire alarm that I've seen before include "Warning to evacuate" , "Warning sound" , "Siren, perhaps" , "Safety equipment" , "Safety device" .)