Crossword Genius

Oral application for beauty treatment (8)

Ross

I believe the answer is:

lipstick

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

This might be a double definition.

'oral application' is the first 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?

'beauty treatment' is the second definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'for' is the link.

Can you help me to learn more?

(Other definitions for lipstick that I've seen before include "Type of paint" , "offered to one's face" , "Cosmetic item" , "Coloured cosmetic" , "Mouth paint?" .)

I've seen this clue in The Globe and Mail.
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