Crossword Genius

One making lock secure? (7)

Ross

I believe the answer is:

hairnet

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'one' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.

'lock secure?' is the wordplay.
'lock' becomes 'hair'.
'secure?' becomes 'net' ().
'hair'+'net'='HAIRNET'

'making' is the link.

Can you help me to learn more?

(Other definitions for hairnet that I've seen before include "Mesh worn over the head" , "Headgear" , "It may keep locks" , "protection overhead" , "It protects locks" .)

I've seen this clue in The Times.
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