Ten gathered in mist admire flower (8)
I believe the answer is:
foxglove
'flower' is the definition.
(I know that Foxglove is a type of flower)
'ten gathered in mist admire' is the wordplay.
'ten' becomes 'X' (Roman numeral).
'gathered in' means one lot of letters goes inside another.
'mist' becomes 'fog' (synonyms).
'admire' becomes 'love' (I've seen this in another clue).
'x' put inside 'fog' is 'foxg'.
'foxg'+'love'='FOXGLOVE'
(Other definitions for foxglove that I've seen before include "Plant (of the genus 10 down) with bell-shaped flowers" , "Plants of the genus Digitalis" , "that grows wild" , "Tall plant with purple or white flowers - vulpine?" , "Flowering plant that's source of digitalis" .)