The visitor loses it (5)

I believe the answer is:

visor

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'the' is the definition.
I can't judge whether this defines the answer.

'visitor loses it' is the wordplay.
'loses' indicates named letters should be taken away.
'visitor' with 'it' taken out is 'VISOR'.

Can you help me to learn more?

(Other definitions for visor that I've seen before include "One protecting" , "Face armour" , "Movable shield on helmet" , "Eyeshade" , "Sunshade" .)

I've seen this clue in The Irish News.

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