Flower lies tangled with weeds (9)
I believe the answer is:
edelweiss
'flower' is the definition.
(I've seen this before)
'lies tangled with weeds' is the wordplay.
'tangled with' indicates an anagram.
'lies' with its letters anagrammed with 'weeds' gives 'EDELWEISS'.
(Other definitions for edelweiss that I've seen before include "Perennial Alpine plant -- we see lids (anag)" , "Swedes lie about small white flower in Switzerland" , "flower as national symbol" , "White-flowered alpine plant" , "high growth" .)