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Observe line has disturbed facial feature (7)

Ross

I believe the answer is:

eyelash

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

'facial feature' is the definition.
The definition and answer can be both body parts as well as being singular nouns.
Perhaps you can see a link between them that I can't see?

'observe line has disturbed' is the wordplay.
'observe' becomes 'eye' (I've seen this before).
'line' becomes 'l'.
'disturbed' indicates anagramming the letters.
'has' with letters rearranged gives 'ash'.
'eye'+'l'+'ash'='EYELASH'

Can you help me to learn more?

(Other definitions for eyelash that I've seen before include "maybe one drops with a wink" , "Hair; cilium (anatomy)" , "A hair in fringe above optic" , "Facial hair, cilium" , "Short facial hair" .)

I've seen this clue in The Telegraph.
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