Flower in weeds lies forlorn (9)

I believe the answer is:

edelweiss

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'flower' is the definition.
(thesaurus)

'weeds lies forlorn' is the wordplay.
'weeds lies' anagrams to 'EDELWEISS'.
But, I am not sure how the anagram is indicated.

'in' is the link.

Can you help me to learn more?

(Other definitions for edelweiss that I've seen before include "Deep admiration" , "Ewe slides on the alpine plant" , "high growth" , "Perennial Alpine plant -- we see lids (anag)" , "I weed less when this flower is around" .)

I've seen this clue in The Telegraph.

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